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Mrathrach Machine - Night of Dissolution (Monte Cook)

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The Mrathrach Machine can be reached from Aggah-Shan’s catacombs (see Part 2) or from the Temple of Deep Chaos (Night of Dissolution, p. 47).

This light remix adapts “The Mrathrach Machine” adventure by Monte Cook from Night of Dissolution (p. 75). You will need the original adventure in order to use this material, which features:

  • A few quality of life enhancements to make it easier for the GM to manage the adventure.
  • An enhanced key featuring bonus content.
  • The resources necessary for creating a full ten-level model of the Machine for use with miniature figures.

The model of the Mrathrach Machine uses resources shared by users of the old Okay You’re Turn forums on Monte Cook’s website, but they have also been remixed and modified.

LEVELS

The levels have the Mrathrach Machine have been enhanced to have special features in the remix, and I’ve shuffled the sequencing of the Machine levels to enhance the flow of the scenario with these special features in mind. Use the following guide to determine where the dungeon levels intersecting the Machine chamber are located (Night of Dissolution, p. 81).

LEVEL 1Face of MrathrachTop Entrance (Area 13)
LEVEL 2Wicker Rhodintor
LEVEL 3Energy PortalsMutated Thralls (Areas 1-3)
LEVEL 4Entrance from the Long Passage
LEVEL 5Ebon Machines
LEVEL 6Ebon Machines
LEVEL 7Ebon MachinesStorage Level (Areas 4-7)
LEVEL 8Chaostechnicians (Areas 8-10)
LEVEL 9Energy Portals
LEVEL 10Skull FociRhodintor Nests (Areas 11-12)

TOP LEVEL: Area 13 and the connection to Aggah-Shan’s Catacombs, which were previously located on the Bottom Level, have been moved to the top level.

ENTRANCE FROM THE LONG PASSAGE: The Long Passage from the Temple of Deep Chaos ends in a door leading to Level 4 of the Machine. See Night of Dissolution, p. 73 for a description of the passage.

BOTTOM LEVEL: Area 13 on the map here can be rekeyed as an additional instance of Area 11 (a rhodintor nest).

ADVERSARY ROSTER

This adversary roster for the Mrathrach Machine supersedes any creatures listed in the Night of Dissolution location key.

  • Active creatures are normal adversaries who are actively working on the Machine. They are initially occupied in the location indicated.
  • Patrols are moving through and around the Machine and are actively alert for intruders. For those located in the Machine Shaft, you can randomize which level they’re currently on by rolling 1d10.
  • Resting creatures are sleeping or otherwise not on alert. They make Perception checks with disadvantage and are less likely to respond actively to threats unless a general alarm is raised or they are specifically fetched by other NPCs for aid.
  • Stationary are creatures who will not move from the listed location. They are included here to fully disambiguate the location key.
ACTIVE
Hao Adus*Level 8 (Area 9)
Legire Endaw*Level 8 (Area 10)
Caldor*Level 10 (Area 12)
Rhodintor, Kravren (x3)Level 8 (Area 10)
Rhodintor, Kravren* (x5)Machine Shaft (split between two random levels)
PATROLS
Venom-Shaped Thralls* (x2)Machine Shaft
Mrathrach Protectors (x3)Machine Shaft
Caldor's Cat*50% Level 10 (Area 12) / 50% with Caldor
RESTING
Venom-Shaped Thralls* (x12)Level 3 (Caves)
Rhodintor, SarycalLevel 7 (Area 7, meditating)
STATIONARY
CloakerLevel 1 (Area 13)
Wraiths (1d3, confused)Interior
ZaugInterior

* Carry teleport stabilizers to negate negative effects of energy portals. (Venom-shaped thralls have them surgically fused to their carapace. Caldor’s cat has it built into its clockwork mechanisms.)

LESSER MRATHRACH PROTECTORS: In addition to the foes listed above, when the Machine begins to destabilize (see below), lesser Mrathrach protectors sprout from the machine:

  • Outside the Machine: 1d6 per round
  • Inside the Machine: 2d6 per round
  • Maximum: 12 in either case.

MRATHRACH PROTECTORS

You can think of the Mrathrach protectors as an extrusion of the machine — protective drones, a technomantic immune response, or just the raw reflex of a mad demigod. Whatever analogy resonates best with you. They are vaguely arachnic in character, although they only have four legs ending in sharp spikes. They go scuttling across the surface of the Machine, and multiply when it is threatened or in need of repair.

MRATHRACH PROTECTOR, LESSER

Small construct, neutral evil


Armor Class 14 (natural)

Hit Points 35 (10d6)

Speed 50 ft.


STR 14 (+2), DEX 14 (+2), CON 11 (+0), INT 10 (+0), WIS 12 (+1), CHA 8 (-1)


Saving Throws Con +2

Skills Athletics +4, Perception +3

Senses darkvision 60 ft.

Damage Immunities: poison, psychic

Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned

Challenge 2 (450 XP)

Proficiency Bonus +2


Self Repair. The protector regains 3 hit points at the start of its turn. The protector does not regain these hit points if it is reduced to 0 hp.

ACTIONS

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 11 (2d8+2) piercing damage.


MRATHRACH PROTECTOR, GREATER

Medium construct, neutral evil


Armor Class 17 (natural)

Hit Points 110 (20d8+20)

Speed 60 ft.


STR 18 (+4), DEX 14 (+2), CON 13 (+1), INT 10 (+0), WIS 12 (+1), CHA 8 (-1)


Saving Throws Con +4

Skills: Athletics +7, Perception +4

Senses darkvision 60 ft.

Damage Immunities: lightning, poison, psychic

Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned

Challenge 7 (2,900 XP)

Proficiency Bonus +3


Self Repair. The protector regains 5 hit points at the start of its turn. The protector does not regain these hit points if it is reduced to 0 hp.

Pounce. If the protector moves at least 20 ft. straight towards a creature and then hits it with a claw attack on the same turn, the target must succeed on a DC 15 Strength saving throw or be knocked prone. If the target is prone, the protector can make one claw attack against it as a bonus action.

ACTIONS

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 40 (4d8+2) piercing damage.

MRATHRACH MACHINE – OVERVIEW

TAINT: This entire Machine Shaft is a tainted location. Tainted effects include:

  • Prismatic spray from the destruction of the Face of Mrathrach (Level 1).
  • Chaotic teleport on Level 3 or Level 9.
  • An exploding ebon machine (Levels 5-7)

Design Note: 3E rules for taint can be found here. I may attempt to adapt these to 5E as part of this Remix in the future. As an alternative, you might use the 5E rules for Madness (DMG, p. 258) or simply eschew this aspect of the Machine entirely.

TAKING DAMAGE: If a character on the scaffolding suffers damage, they must succeed on a Dexterity saving throw (DC 8 + 1 per 10 damage taken). On a failure, they are knocked off the scaffolding, but may attempt an additional DC 18 Dexterity saving throw to catch themselves on the edge (rather than plummeting down the shaft).

Playtest Tip: Don’t forget to have NPCs try to push the PCs off the scaffolding.

INNER RING – MOVING PARTS: PCs on the inner ring must make a DC 12 Dexterity saving throw each round. On a failure, they are knocked off the scaffolding by some part of the Machine which has unexpectedly jutted or spun out, but they may attempt an additional DC 18 Dexterity saving throw to catch themselves on the edge.

  • NPCs are immune to this effect due to their familiarity with the machinery, unless unable to move.

STEAM VENTING: There is a 1 in 6 chance per level of steam being vented out of the machine.

  • Target: A random character on that level (and any other characters in a line with them).
  • Inner Ring: 4d6 fire damage, DC 14 Dexterity saving throw for half damage.
  • Outer Ring: 2d6 dire damage, DC 14 Dexterity saving throw for half damage.
  • NPCs are immune to this effective due to their familiarity with the machinery, unless unable to move or in line with the randomly determined target.

FALLING:

  • Second Chance: Characters falling more than 50 ft. through this chamber can attempt a second Dexterity saving throw (DC 15) to catch themselves on a lower level. The character still suffers falling damage for the distance they fell.
  • House Rule – Catching a Falling Character: If it seems as if a character on a lower level would be in a position to catch a falling character, they can use a bonus action to do so by making a successful Dexterity saving throw (DC 10 + 1 per 10 feet fallen). The falling character still suffers damage for the distance they fell.

CHAOS EFFECTS

The Machine Shaft is permeated with chaotic energy. Each time a character takes an action requiring an ability check in the chamber or casts a spell, there is a 1 in 20 chance the action is afflicted by the energy. Roll on the Chaos Effect table.

Playtest Tip: This element works best if you lean heavily into describing the strange, probability-defying distortions wrought by the chaos energy of the Machine. Use the mechanical effects listed here as inspiration, but customize the exact effect to the current circumstance and the action being attempted.

TABLE: CHAOS EFFECTS

d10Action EffectSpell Effect
1Forced rerollC 10 + spell level Intelligence (Arcana) check to control the spell. On failure, roll Major Chaos Effect.
2Automatic critical successSpell’s effect is maximized.
3-4 modifier to the checkSpell acts as if cast 1d4 levels lower; targets have advantage on saving throws.
4-2 modifie to the checkSpell acts as if cast 1 level lower; targets have advantage on saving throws.
5+2 modifier to the checkSpell acts as if cast 1 level higher; targets have disadvantage on saving throws.
6+4 modifier to the checkSpell acts as if cast 1d4 levels higher; targets have disadvantage on saving throws.
7GlitchCosmetic effect of spell is bizarre.
8CatastropheSpell reverses target or effects random target.
9-10Roll Major Chaos EffectRoll Major Chaos Effect.

TABLE: MAJOR CHAOS EFFECTS

d20Chaos Effect
1Character and target swap places.
21d4 of character’s limbs turn invisible.
31d4 of character’s limbs turn to stone.
4A glowing halo appears around the character’s head.
5A nimbus of shadow appears around the character’s head.
6A statue of the character appears where they were 5 seconds before.
7Characters becomes 2-dimensional for 1d4 rounds.
8Character’s clothes turn to lead for 1d4 minutes.
9Character sees everything around them rapidly age, then revert to pristine, then back again.
10A worm grows out of the character’s ear.
11Character is hurled 10 ft. in a random direction.
12It begins to rain (locally around the character or throughout the entire chamber).
13Characters throughout the chamber have a 50% chance of entering a shared time stop.
14Character’s decision bifurcates and a duplicate appears to resolve both actions before quantum-collapsing back into a single probability.
15A burst of blinding light, requiring a DC 12 Constitution saving throw to avoid becoming blinded for 1d4 rounds.
16Character floats 2 feet off the ground.
17Character disappears for 1d4 rounds, then reappears in same location mid-action.
18Character’s consciousness is swapped with that of another random character.
19Character teleports to a different level of the machine.
20Character teleports to the interior of the machine.

DESTROYING THE MRATHRACH MACHINE

In order to destroy the Mrathrach Machine, the PCs must first destabilize the Machine, after which it will explode.

DESTABILIZING: There are three ways to destabilize the Machine.

  • Disable 7 out of 10 levels.
  • Disable the internal resonance.
  • Kill the zaug inside the Machine.

EXPLOSION: Occurs 10 rounds after destabilization.

  • Inside the Machine: 20d6 fire damage, DC 25 Dexterity saving throw for half damage.
  • In the Shaft: 10d6 fire damage, DC 25 Dexterity saving throw for half damage.
  • Collapse: As the machine collapses, anyone on the Machine falls, suffering falling damage from their current level to the bottom of the shaft. They must also attempt a Dexterity saving throw (DC 10 + 2 per level fallen) to avoid objects. On a failure, they suffer 2d6 bludgeoning damage per level fallen.

REWARD: Destroying the Machine earns the PCs a reward of 15,900 XP. (XP equal to a CR 10 encounter + the XP for defeating the CR 13 zaug.)

DISABLING LEVELS

Here’s a quick reference for how each level of the Machine can be disabled. Each is described in more detail in the level description.

LEVELHOW TO DISABLE
1Destroy the Face of Mrathrach.
2Destroy all three wicker rhodintors.
3Overload 4 energy portals.
4Skill check.
5-7Destroy ebon machine.
8Skill check.
9Overload 4 energy portals.
10Remove or destroy all skull foci.

Go to Part 3B: Mrathrach Key

Call of the Netherdeep - Jewel of Three Prayers

Go to Part 1

THIS BROKEN RAILROAD

By its nature, Call of the Netherdeep is a linear campaign: Festival of Merit → Emerald Grotto → Bazzoxan → Ank’Harel → Cael Morrow → the Netherdeep.

In theory, this should be fine.

In practice, however, the designers have decided to link these set pieces together with a railroad.

And, unfortunately, it’s a really shoddy railroad. Honestly, just sloppy, terrible, ill-conceived infrastructure. Maybe not quite, “there’s a dragon attacking a town that’s also being besieged by an army, and our expectation is that the 1st level characters will decide to just walk into town,” bad, but close.

Let’s start with the hook for the entire campaign.

At the end of the Festival of Merit, the Elders of Jigow choose the two most successful teams to compete in the Grand Finale race through the Emerald Grotto. One team will be the PCs. The other team will be the Rivals.

This is a little weird, because literally none of the festival games up to this point have been team-based events. The only previous mentions of a “team,” in fact, were (a) an event where you are explicitly FORBIDDEN from competing as a team and (b) a different event where you competed with a partner (which is not the same thing as the five-ish person teams selected at the Grand Finale).

So, to kick things off, there this’s big, glaring continuity error squatting right on top of the event which is the lynchpin for the entire campaign.

In any case, the PCs and Rivals have to race through the Emerald Grotto and claim the Emerald Eye. Whichever team returns with the Emerald Eye wins the race.

Oddly, the adventure then acts as if the races ends as soon as someone grabs the Eye. Which, of course, it doesn’t.

But let’s move past that, too.

The real problem here is that the entire campaign hook is horribly broken.

Here’s how it works:

  • The PCs get to the end of the Emerald Grotto and they spot a shark that has the Emerald Eye strapped to its side.
  • They fight the shark.
  • When the shark dies, it crashes into a stone pillar, causing the wall of the cavern to crack open.
  • This reveals a passage “awash with golden light.”
  • If the PCs go down the passage, they will discover the Jewel of Three Prayers, which — as noted above — is the essential McGuffin on which the entire plot is built.

Problem #1: It’s a race.

So, yeah, the glowy light is interesting. But the PCs are motivated by their immediate and only goal to NOT explore the light right now. Generally speaking, you want scenario-crucial actions to flow from the established goals of the PCs, not in direct contradiction to them.

The same is true of the Rivals, of course, but ultimately you, as the DM, control their actions, so you can just decree that they go and check out the glowy light even if the PCs don’t. The campaign is designed to hypothetically work if the Rivals claim the Jewel of Three Prayers (more on that in a second), so you can route around this. It’s just kind of awkward in its design.

The bigger problem is that you don’t have to fight the shark.

In fact, fighting the shark is probably the dumbest way for the PCs to get the Emerald Eye.

Even if you overrule an Animal Handling check, that still leaves alternative solutions like mage hand (to grab the amulet), an animal friendship spell, or just a Stealth check (with or without invisibility). And it should be noted that the writers know that these options exist, because animal friendship is how they get the amulet on the shark in the first place:

A druid of Jigow cast animal friendship on the shark earlier today and tied the Emerald Eye around its body, then made a speedy getaway.

So… no dead shark?

No thrashing.

No thrashing, no pillar collapse.

No pillar collapse, no glowy light.

No glowy light, the campaign doesn’t happen.

Oof.

Okay, let’s move forward to the next day. There are four scenarios:

PCs have the Jewel, the Rivals are Indifferent. The Rivals decide to just follow the PCs. (We’ll come back to this.)

PCs have the Jewel, the Rivals are Friendly. The Rivals offer to join the PCs (and, as mentioned before, the rivalry breaks and GMPC problems start).

PCs have the Jewel, the Rivals are Hostile. In this case, the Rivals try to steal the Jewel. First, as mentioned earlier, this probably means that the Rivals are now dead and the rivalry is over. More than that, the railroad is frequently driven by the Rivals showing up by surprise and forcing the plot forward: So whether they’re working with the PCs or they’re dead, the railroad breaks multiple times over.

Second, their plan for stealing the Jewel is also hilarious:

The rivals’ plan is to gather outside the inn where the characters are staying. One rival then sneaks into the characters’ room at the inn and searches for the jewel. If the thief doesn’t return after an hour, the rivals travel to the Emerald Loop Caravan Shop (described later in this chapter) and wait up to seven days for their mission companion.

Uhh…

Maggie: So the plan was for Galsariad to sneak in and grab the Jewel?

Ayo: Yup.

Maggie: And then he comes right back?

Ayo: Yup.

Maggie: And he hasn’t come back.

Ayo: Yup.

Irvan: What should we do?

Ayo: Let’s leave town and wait at a rest stop for a week. See if he shows up.

Anyway.

The Rivals have the Jewel. This is, as both we and Call of the Netherdeep have established, quite likely. And if it happens, the railroad junction is almost unimaginably bad:

You’re eating breakfast at the Unbroken Tusk while locals chat around you. Through the cacophony, one voice catches your attention.

“Rumor has it they’re going to Rosohna to sell it. Elder Ushru met them and everything, kept whispering while pointing at a huge, shiny amulet on the table. He was talking about ‘destiny’ and other heroic-like words. I think they were the group who won the grand finale yesterday. The amulet looked plenty magical, but even if it isn’t, it’d be worth a fortune. Yeah, they’re traveling down the Emerald Loop today.”

[…]

People are saying that the jewel would sell for over 1,000 gold pieces — maybe twice that if it’s magical, and twice that again if the sellers were to make the long, oversea journey to a trade hub like the desert metropolis of Ank’Harel.

Nothing is forcing the characters to chase down the rivals, but the thought of losing out on such a prize is enough to motivate most adventurers.

That’s it. That’s the hook: Chase the Rivals down and rob them.

“The thought of losing out on such a prize is enough to motivate most adventurers.”

That’s not adventurers. You’re thinking of criminals.

And not even very smart criminals. There’s gotta be easier marks for 1,000 gp than five well-equipped adventurers who already beat you once.

Even if the players do hear these rumors and leap straight to, “Oh, man! We definitely gotta rob those people!” Call of the Netherdeep forgets to include a mechanism for telling them that they’re supposed to go to Bazzoxan.

Sure, they might interrogate the Rivals before/after robbing them. Or maybe they follow them all the way to Bazzoxan before robbing them.

But if not, the entire adventure is literally scripted to derail.

EVERYTHING FAILS TOGETHER

Sadly, the whole campaign is like this. Every transition is a broken, ill-conceived railroad.

One I want to call particular attention to, however, is the transition from Bazzoxan to Ank’Harel, because I think it reveals the fundamental misstep of Call of the Netherdeep here.

To briefly review, the core structure here is:

  • The PCs meet one or more of the three researchers in Bazzoxan.
  • They go into Betrayers’ Rise.
  • They follow one of the researchers back to Bazzoxan, where they join that researcher’s faction.

This seems pretty straightforward, right?

But every step of the way, Call of the Netherdeep transforms this into a tortured disaster.

First, the campaign hides the researchers so that the PCs have to jump through weird, arbitrary, unlabeled hoops to meet them.

The first option is:

  • The PCs randomly wander over to the crematorium.
  • They decide to stay and help dispose of corpses.
  • A researcher named Prolix shows up.

If the PCs don’t go to the crematorium? The campaign breaks. If they don’t help dispose of the corpses? The campaign breaks.

The second option is:

  • The PCs eventually wander into the inn.
  • Among a number of other patrons, there’s a tiefling in the common room.
  • If they don’t talk to the tiefling, the adventure specifically says the tiefling will ignore them.
  • If they do talk to the tiefling (who is named Question), they need to mention the Jewel of the Three Prayers.
  • If they mention the Jewel, then the third researcher (Aloysia), who has been eavesdropping on this conversation, will be like, “Hey! I’m the NPC who tells you what to do next!”

Don’t randomly talk to the tiefling? The campaign breaks. Don’t decide to spontaneously mention the Jewel (which you could very easily have decided is something you shouldn’t be flashing around) during this specific conversation? The campaign breaks.

Call of the Netherdeep - TieflingThis is, to put it politely, a very convoluted path. It’s really unclear to me why they’re locked the plot behind these deliberately obfuscated checkpoints.

To put it less politely, this is video game writing. And, sure, in a video game you can expect the players to keep clicking on NPCs in the tavern until they click on the right tiefling. But it doesn’t translate to the table top at all. There is no display of patrons for the players to click on.

But we’re not done yet.

Aloysia then proposes that she and the PCs should work together. Of course, as we’ve established, the campaign then just assumes the PCs will not accept her offer and pretends it never happened.

The campaign is simultaneously pretending that there’s no way the PCs are working with the Rivals, either. This is important, because, at the end of Betrayers’ Rise, the designers frame up a heavily railroaded “gotcha!” scene where Aloysia, accompanied by the Rivals, shows up and steals the Jewel.

This forced fight (which can’t happen at all if any of these convoluted preconditions is not met), ends with one of two scripted outcomes.

If Aloysia wins, she cracks a teleportation tablet, creating a teleportation circle to Ank’Harel, and announces that the Rivals should follow her. The PCs theoretically have the opportunity to follow her here, but since they’re presumably dead or unconscious, this is unlikely.

If Aloysia loses, she runs away and casts earthquake, triggering a cave-in that blocks the PCs from pursuing her. She then fumbles through her bag and — hilariously — drops two teleportation tablets on the ground while trying to activate a third.

The PCs can then spend 10-20 hours digging their way out, find the teleportation tablets, think to themselves, “This definitely isn’t a trap,” and then use them to follow her.

Now, once the PCs get to Ank’Harel, the book acts as if the PCs are equally likely to join each of the three factions. But that’s not really the case, is it? First, Aloysia has just tried to rob them (and possibly kill them). Remember the Unforgivable Sin of stealing the PCs’ shit? Yeah.

Second, the only way for the PCs to join Aloysia’s faction — the Consortium — is if they raced after her, jumped through the teleportation circle moments after she went through, immediately forgave her for everything, and then signed up on the spot.

I mean… C’mon. Even if the adventure wasn’t doing everything in its power to stop the PCs from doing that, it’s not exactly a plausible outcome, right? “Hey, person who just tried to kill us! We are interested in your ideas and would like to hear more! Do you have a pamphlet or anything we could look over?”

It seems fairly likely to me that all of this would have made a lot more sense earlier in development: You have dynamic, interesting Rivals. The researchers in Bazzoxan would have had clear, ruidium-focused agendas. This would allow the players to make meaningful choices about which faction’s agenda they agree with, and these choices could have been contrasted against the choices of the Rivals, driving the action forward through Bazzoxan and into Ank’Harel.

If the book just presented these as toys for the DM to actively play with, it’s a robust situation rich with possibility.

But then somebody decided that they needed to write a railroad that forces Aloysia to be a maniacal, monologuing villain.

And the whole thing falls apart into nonsense.

The researchers get hidden behind scripted cut scenes in Bazzoxan. The adventure wants to hide what the researchers know (so that there can be Startling Revelations™ in Ank’Harel), so the PCs aren’t given the information to make meaningful choices. Aloysia gets railroaded off the table as a viable ally.

No clear stakes? The choice of researcher becomes arbitrary.

No true choice in researchers? The faction recruitment in Ank’Harel breaks.

All of these threads — all of these broken techniques based on the fundamental flaw of believing that railroading is the only way to link an adventure together — are woven together here. The result is muddy, confusing, difficult to use, and, more often than not, completely broken in actual practice.

It’s easy to look at a moment like this and say, “Well, the writers can’t possibly account for every possibility!”

And you’d be right.

Which is why Call of the Netherdeep SHOULD be focusing on giving the DM — who CAN account for what the group has done — the tools to do so, rather than hamstringing them with unusable scripts.

FACTION MISSIONS

Call of the Netherdeep - Aboleth Spawn in Cael Morrow

In addition to the shortcomings of Netherdeep’s connective tissue, we now need to talk about the faction missions in Ank’Harel.

Like the faction missions in Dragon Heist, these are very barebones in their presentation.

Unlike the faction missions in Dragon Heist, these aren’t designed to be run as contrapuntal story beats while other stuff is happening. They’re just a linear string of events. So the barebones approach here mostly just means that this phase of the campaign feels incomplete.

The other problem with the faction missions is that… well, they’re pretty bad.

For example, there’s a mission where someone is trying to frame one of the PCs’ friends for stealing a ring by planting it in his pocket. So the PCs mount an investigation to clear their friend’s name.

They find two pieces of evidence:

  1. An Insight check reveals that someone has a “guarded expression.”
  2. This same person, a researcher in the ruidium-infested ruins of Cael Morrow, has a ruidium infection.

The adventure then confidently announces: “The characters can present their findings to Headmaster Gryz Alakritos.”

WHAT findings?

Bizarrely, their NPC friend, whose name they “cleared,” then gives them the ring as a reward.

The stolen ring.

That isn’t his.

Because that was the whole premise of the entire scenario.

The next faction mission features the PCs needing to track down a double agent. This one wraps up when the PCs find two pieces of evidence:

  1. An Insight check reveals the agent’s “true intentions and affiliation.”
  2. This same person, a researcher in the ruidium-infested ruins of Cael Morrow, has a ruidium infection.

And if you’re thinking, “Justin, you just said that.”

Yes.

Yes, I did.

It’s the exact same setup.

And the conclusion is, once again, “Proof?! Sir, I made an INSIGHT check!”

Add to this the aforementioned problem of multiple faction missions being set in the ruins of Cael Morrow, despite Cael Morrow being too small to support multiple faction missions.

Basically, the faction missions are really bad.

Fortunately, they’re also pointless: The idea is that you have to do these faction missions in order to gain access to Cael Morrow. But it turns out that the impregnable security on the Cael Morrow site consists of… a handful of CR 1 guards who might summon five CR 3 guards if they get a chance.

CONCLUSION

I’ve spent the last couple of sections really breaking down the problems with Call of the Netherdeep, so as we wrap up, I want to mention a few more things that I really like about the book.

First, the monster design is fantastic. Look at this aboleth spawn, it oozes creepiness:

Call of the Netherdeep - Aboleth Spawn

And look at this sword wraith:

Call of the Netherdeep - Sword Wraiths

Just incredible concepts wedded to fantastic art. In fact, as you’ve seen throughout this review, the art team for Call of the Netherdeep is simply superb from one end of the book to the other.

Speaking of the visual design, I also want to mention the ruidium-inspired design of the book. At the beginning of the campaign, the occasional page will have have a ruidium-veined edge treatment. Over the course of the book, however, these veins grow, until the ruidium appears to be literally taking over the tome.

I don’t know if that’s the work of Senior Graphic Designer Trish Yochum or Graphic Designer Matt Cole, or both, but bravo. Excellent work.

In closing, as I look over the totality of Call of the Netherdeep, I see some familiar themes and elements:

But the synthesis works here. In fact, in all but one case (the faction missions), I think you can safely argue that each individual element works better in Call of the Netherdeep than in its antecedents.

I think there are, as we have seen, some serious issues with structure and logic that will make this campaign much harder to run effectively than it should be. Ultimately, whether you decide to answer the Call of the Netherdeep or not is largely going to depend on whether you think it’s worth the salvage effort to rebuild the core structure of the campaign into something that makes sense.

The things to focus on, I think, are:

  • Those excellent dungeons that form big, meaty pillars to build your campaign around.
  • The fundamental excellence of the Rivals once your strip away the badly scripted sequences.
  • The beautiful and enigmatic lore of Alyxion the Apotheon, which — if properly structured — will draw the players deep into a tragic story of epic proportions and then empower them to provide its conclusion.

Despite my reservations, I recommend Call of the Netherdeep. With a manageable amount of work, I think you’ll find something truly special for you and your players to enjoy.

Style: 5
Substance: 3

Project Leads: James J. Haeck, Matthew Mercer, Christopher Perkins
Writers: James J. Haeck, Makenzie De Armas, LaTia Jacquise, Cassandra Khaw, Sadie Lowry
Publisher: Wizards of the Coast
Cost: $49.95
Page Count: 224

Call of the Netherdeep - Wizards of the Coast

FURTHER READING
Call of the Netherdeep: Running Betrayers’ Rise
Call of the Netherdeep: Running the Rivals
Remixing Call of the Netherdeep
How to Remix an Adventure

Call of the Netherdeep - Emerald Grotto

Go to Part 1

THE DUNGEONS

Call of the Netherdeep is studded with a sequence of really cool dungeons:

  • Emerald Grotto
  • Betrayers’ Rise
  • Cael Morrow
  • The Netherdeep

Emerald Grotto is the launch point of the campaign. It’s a pretty basic cave design, but the underwater setting gives it some nice flavor. The forked design is also used to structurally highlight the relationship between the PCs and the Rivals.

Betrayers’ Rise is you standard “cyst of evil” affair, but the devil is in the details here. (Pun intended.) The map is lightly xandered, giving the PCs some nice strategic control in their exploration, and the key is drenched in gothic atmosphere.

Cael Morrow is a sunken city. Or, more accurately, a small part of this city. This is probably the weakest of the dungeons, but is still quite good. The back half opens up, allowing for a more freeform exploration of the ruins, and the key is once again excellent in its specific detail.

The Netherdeep is the big finale of the campaign, an extrusion of the Apotheon’s subconscious mind and memory. And, not to sound like a broken record, once again the map is great and the key richly detailed.

Here’s a good example of how great these dungeon keys are:

R2. HALL OF HOLES

The walls of this hallway are covered with carvings that depict a great battle involving mortals, celestials, and fiends. A faint whistling noise emerges from the walls, sounding almost like snoring.

A character who succeeds on a DC 15 Intelligence (History) check recognizes the wall carvings depict the Battle of the Barbed Fields. This fight was a climactic battle of the Calamity, in which the devotees of the Prime Deities broke through the garrison at the Betrayers’ Rise and reached the walls of Ghor Dranas. Prominently depicted in one scene is a proud, melancholy warrior with curly hair carrying a spear and shield. By his side are two figures; a white-haired girl no more than twelve years old, and a young adult woman with hair that flows behind her, turning into a road upon which countless soldiers march. A character who makes a successful DC 10 Intelligence (Religion) check realizes that the latter two are common depictions of the gods Sehanine the Moon Weaver and Avandra the Change Bringer.

There are several things to note here.

First, the boxed text invokes multiple senses, not just sight.

Second, you see generic “there are pretty pictures on the wall” or “there are some statues here” in dungeon keys all the time, but the writer here has taken the effort to get specific with the art: The hall isn’t just covered in carvings; it’s covered in these specific carvings depicting this specific thing.

Third, this effect is enhanced with multiple skill checks allowing one or more PCs to dive even deeper into the lore. This turns the lore into a reward, giving real meaning to the PCs’ abilities and also likely investing the players more deeply in what their abilities have revealed.

In a single room, this attention to detail is nice. Over the course of the entire campaign, it elevates the entire experience. This is the practical method by which the world of Exandria is brought to vivid life in Call of the Netherdeep.

When it comes to the dungeons, however, I do have a quibble.

Taken on their own merits, Betrayers’ Rise and Cael Morrow are both really good dungeons. The problem is that the dungeons are too small for the lore surrounding them.

Betrayers’ Rise, for example, is presented as a sort of Moria or Undermountain: A vast underground complex with depths unexplored and perhaps unexplorable, out of which demons of the Abyss emerge to threaten the town above. But the actual dungeon found in Call of Netherdeep is teeny-tiny, consisting of just sixteen rooms.

To address the mismatch, the writers kind of toss out the idea that “the characters experience a particular version” of Betrayers’ Rise, and that others experience “different configurations” of the dungeon. They also provide “Betrayers’ Rise Encounters” (p. 63) that can be used as inspiration to “expand” the Rise. But ultimately you’re selling one experience and then delivering another.

Call of the Netherdeep - Betrayers' Rise

Betrayers’ Rise does, ultimately, work as presented, even if it’s not ideal. More problematic is Cael Morrow: Here again, the lore treats the drowned city as a vast archaeological site… but only delivers a handful of buildings and seventeen keyed locations.

In Cael Morrow, however, this is not just an aesthetic mismatch; it’s a deeply flawed structure. The campaign is designed with the expectation that the PCs will journey down into Cael Morrow for a series of faction missions (at least three, possibly more). This makes sense if the archaeological expedition is exploring the entirety of the ruined city, but it isn’t. Cael Morrow simply isn’t large enough to support the iterative missions.

Imagine that you give the PCs a faction mission that sends them into a dungeon. And, when that mission is done, there are seven DAYS until they receive their next mission. (And then another seven days between that mission and the one after that.)

What are the PCs going to do?

Well, if they didn’t completely explore the dungeon during the first mission (and they very easily may have), they’re almost certainly going to go back and finish exploring the dungeon.

Again: It’s only seventeen rooms.

And there’s nothing else for them to do in Ank’Harel.

Because Cael Morrow’s design doesn’t match its lore, there’s just no way these faction missions can work as written.

A good chunk of Cael Morrow is also hilariously linear given the nature of these missions.

The way it works is that the Allegiance of Allsight (one of the Ank’Harel factions) has used magical keystones to create regions of the city where the water is held back, making it much easier for them to excavate these sites. In practice, what they’ve done is create a linear corridor of air about 300 feet long.

One of the Allsight faction missions involves the primary archivist, who is concerned because one of his researchers has been missing for three days and he has no idea where she might be.

Where is she?

200 feet away, straight down a linear corridor.

To be clear, the problem here is not that the excavation site is limited to only one small portion of the city. (As I mentioned before, on its own merits the design of Cael Morrow dungeon is pretty good.)

The problem is that everything in the campaign — the NPCs, the faction missions, the lore, the pacing — is pretending this isn’t the case.

Go to Part 3: This Broken Railroad

Call of the Netherdeep - Wizards of the Coast

SPOILERS FOR CALL OF THE NETHERDEEP

Call of the Netherdeep is a campaign set in Exandria, the world of Critical Role created by Matthew Mercer.

I have virtually no knowledge of Critical Role.

I haven’t read the comic books or the tie-in novels. I haven’t watched the animated series. Of the original show itself, I’ve watched a number of clips, a couple of episodes, and Matthew Colville’s phenomenal recap of the Season 1 finale. (Which still brings tears to my eyes.)

I haven’t even had the time to dive into the Explorer’s Guide to Wildemount or the Tal’dorei Campaign Setting.

Nonetheless, Call of the Netherdeep is something that I’ve wanted Wizards of the Coast to do for awhile now: Release a sourcebook for a campaign world (e.g., Explorer’s Guide to Wildemount) and then support it with a full campaign book. (Ravnica, Theros, etc. They’d all be more useful with an accompanying campaign book.)

In any case, this review tackles Call of the Netherdeep on its own terms and only its own terms.

OVERVIEW

Call of the Netherdeep starts the PCs at 3rd level (and eventually wraps up as they hit 12th level). Things kick off in the coastal village of Jigow, where the PCs have arrived just in time to enjoy the Festival of Merit. While enjoying the festival games, they fall into rivalry with another group of adventurers who are also competing. As the festival draws to a close, both groups race through the Emerald Grotto, an underwater obstacle course, in order to claim a magical spear that has been stuck into the side of a shark.

When the shark is killed, its death throes knock open an underwater temple that has been lost since the time of the Calamity (a semi-legendary apocalypse). Inside the temple, either the PCs or their rivals claim the Jewel of Three Prayers, an artifact which once belonged to Alyxion the Apotheon.

The PCs are then sent to Bazzoxan, a small city that was built around Betrayers’ Rise, a huge temple complex dedicated to the Betrayer Gods and squatting atop a vast dungeon. The Rise had been abandoned since the Calamity, but would-be explorers delved too deep and awoke Abyssal portals. Bazzoxan is now a military compound — the front line in a war against demons and abominations streaming up from below.

While in Bazzoxan, the PCs will run into scholars belonging to three different factions from the distant city of Ank’Harel who have come to Bazzoxan because [SPOILERS FOR THE NEXT CHAPTER, TELL THE PLAYERS NOTHING]. Heading into the depths of Betrayers’ Rise themselves, the PCs discover another temple that adds extra magical mojo to the Jewel of Three Prayers.

Following one or more of the scholars back to Ank’Harel, the PCs join their faction. After completing a series of faction missions, the PCs are eventually granted access to the ruins of Cael Morrow, a city which was destroyed during the Calamity and now lies sunken below an underground sea beneath Ank’Harel.

Within Cael Morrow, the PCs eventually discover (and enter) the transdimensional prison in which Alyxion the Apotheon has been held since his “death” during the Calamity. Within this prison, the PCs explore manifestations of Alyxion’s memories, learning the true story of what happen to him. In short:

  • He was born under the red moon of Ruidus, which is considered bad luck.
  • He entire life was, in fact, an endless string of bad luck.
  • During the Calamity he prayed to the gods three times for assistance to save those in peril, and three times the gods answered his prayer (creating the Jewel of Three Prayers).
  • When Gruumsh attempted to destroy all life on the continent of Marquet with a single blow of his spear, the Apotheon countered the blow with his semi-divine power. Cael Morrow was destroyed, but the rest of the continent was spared.
  • The fury of Gruumsh’s blow, combined with Alyxion’s parry and the destruction of Cael Morrow, ripped open an interdimensional space into which the strange energies of Ruidus flowed. This was the Netherdeep, and it became Alyxion’s prison.

Recently the Netherdeep has been leaking, its strange energies escaping in the form of ruidium – a reddish crystal that is both immensely powerful and also corrupting. The PCs have been encountering ruidium since the beginning of the campaign, and it turns out the factions in Ank’Harel want access to its source so that they can either exploit it or destroy it (depending on their individual agendas).

At the campaign’s finale, the PCs confront the Alyxion in three different forms, ultimately deciding whether to kill the Apotheon, redeem him, or unleash him. A decision which will have consequences for all of Exandria.

THE RIVALS

So if we strip away the Critical Role tie-in, what’s the log line for Call of the Netherdeep? What’s the pitch? Why would you pick this campaign over any other campaign?

Well, as you can see from the summary, this is an epic adventure: From humble beginnings, the PCs journey across vast distances to save the world.

There are, of course, any number of such campaigns, but Call of the Netherdeep is a well-formed one. The transition from the gothic depths of Betrayers’ Rise directly to the sun-drenched streets of Ank’Harel, for example, is beautifully vivid, and speaks to the varied and richly realized milestones in the PCs’ journey. The underwater themes of the adventure — in the Emerald Grotto, Cael Morrow, and the Netherdeep —  also give it a distinctive flair.

But Call of the Netherdeep’s truly unique calling card is the Rivals: Five NPCs who form their own adventuring party and dog the PCs’ heels throughout the campaign.

So my elevator pitch for Call of the Netherdeep would be:

It’s an epic adventure, like the Lord of the Rings. But you have a group of rivals who are competing with you for glory.

The best thing about the Rivals are the rivals themselves: Ayo Jabe, Dermot Wurder, Galsariad Ardyth, Irvan Wastewalker, and Maggie Keeneyes. Each is given a great backstory and strong personality, which are then expertly presented in three or four paragraph briefings. Each is also given an individual goal to pursue.

Call of the Netherdeep - Ayo Jabe (Nicki Dawes)The result is very easy to pick up and play, with lots of varied opportunities for cool interactions. In fact, if you paired these up with character sheets, you’d have a great party of pregenerated PCs, which speaks to just how solid these characters are.

The Rivals are then given a really great introduction, being individually introduced during the festival games in Jigow, so that the players have a chance to form one-on-one relationships with them (instead of the Rivals just becoming an undifferentiated mob).

Unfortunately, in practice, the Rivals are then marred (possibly crippled) by the adventure’s execution.

The core problem is that the campaign is railroaded. Or, more accurately, that it’s railroaded badly. We’ll discuss this in more detail momentarily, but as far as the Rivals are concerned, this railroading hamstrings their ability to actually have a rivalry. A rivalry generally requires you and your rival to be in competition to achieve a common goal and/or to demonstrate your superiority in a field of endeavor.

But like most bad railroads, Call of the Netherdeep (a) scripts predetermined outcomes and (b) struggles with presenting a clear, actionable agenda.

So the rivalry largely works at the beginning of the campaign — when the PCs and the Rivals are both clearly aimed at winning the Emerald Grotto race — but then rapidly falls apart. You can’t race to achieve a goal before your rivals do when the campaign has failed to define what your goal is. Nor can you meaningfully race someone if they’re scripted to show up in the next cutscene.

The other major problem is that the relationship between the Rivals and the PCs is defined entirely by attitude: The Rivals are Friendly, Indifferent, or Hostile.

This gauge is basically designed to produce fail-states in the rivalry.

If the Rivals are Hostile, for example, they are constantly framed up to either:

  • try to steal the magical artifact from the PCs; and/or
  • attack the PCs and try to kill them.

In my experience, there are two Unforgivable Sins that an NPC can commit:

  1. They can kill a PC’s pet.
  2. They can steal the PC’s shit.

Anything else (even assassination attempts) can probably be forgiven, but if an NPC does either of these things? The PCs will never forgive them and will almost certainly kill them on sight.

So if the Rivals go Hostile, the overwhelmingly likely outcome is that the PCs will kill them very early in the campaign. And then, obviously, no more rivalry.

On the other hand, if the Rivals go Friendly, the logical outcome is that they’ll offer to work with the PCs. As Call of the Netherdeep says:

If [Ayo Jabe] gets the sense that the characters have stumbled onto something big, her eyes grow wide. She decides that she and her group want a piece of the action and proposes that they travel with the characters, saying that there’s safety in numbers. A character makes a successful DC 13 Wisdom (Insight) check realizes that she isn’t hiding anything and wants nothing more than to be part of a grand adventure.

It seems rather likely that the PCs will agree with Ayo Jabe’s logic… and now you have five GMPCs to deal with.

This, honestly, feels like a huge headache to me. Even running one NPC companion can create issues with spotlight time and bias (perceived and actual), as I discuss in more detail here. But the Call of the Netherdeep - Galsariad Ardyth (Nicki Dawes)really big problem is combat balance: Running 5th Edition D&D for a group of ten PCs is infamously difficult because the action economy means results in any encounter with a small number of opponents (one or two or three) just getting absolutely curb-stomped.

Crucially, Call of the Netherdeep is not designed for this: The encounters are neither CR-balanced for ten party members, nor are they designed for large groups. Betrayers’ Rise, for example, is made up entirely of encounters with 1-3 opponents, and will be absolutely steamrolled if the PCs and Rivals have teamed up.

The campaign clearly knows it has a problem here, so — even though it explicitly mentions that Ayo Jabe will offer to work with the PCs — it just silently assumes that the PCs won’t do that.

Problem solved, right?

No.

Rather the opposite, actually, because the book, as part of its bad railroading, just blithely includes multiple pre-scripted scenes which assume that the Rivals are definitely not working with the PCs.

This is actually something that Call of the Netherdeep does quite often, and it’s honestly kind of bizarre: An NPC will approach the PCs, offer to work with them… and then the book just assumes that they don’t do that.

Maybe the authors have just literally never had players willing to work with NPCs before?

Regardless, the result is badly broken.

To sum up: The Rivals are incredibly cool. But if you run them the way the book tells you to, then somewhere around Chapter 2 they will end up either:

  • dead;
  • no longer rivals of the PCs; and/or
  • breaking the campaign.

I think we can mark this down as “rough around the edges.”

Go to Part 2: The Dungeons

Published adventures don’t know your PCs, so they have to go generic. But you should never be satisfied with that.

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