Session 16A: To Labyrinth’s End

There was another hall directly opposite the one they had emerged from, but they could see that it ended in a complete collapse after only a few dozen feet. (A careful examination of Ranthir’s maps suggested that this was part of the same collapse that had blocked their progress on the upper level.

In the Laboratory of the Beast I use collapsed tunnels primarily to create an illusion of scale. Although this particular complex was already quite large (comprising 60+ rooms), I wanted to give the impression that it had originally been even larger. So I simply collapsed part of the complex.

There are a couple techniques that I think help to sell this illusion:

First, the complex needs to already have some scale to it. I’ve found that if you just map two or three rooms and then collapse a tunnel that supposedly leads to a vast complex that no longer exists, the players don’t really feel it.

Second, include smaller collapses that the players can discover the other side of (by circling around). The fact that stuff exists behind this collapse will reinforce the illusion that there were vast chambers behind all of those other collapses, too.

A brief digression here: Why did I decide 60+ rooms was enough and then evoked the rest of the complex by collapsing corridors?

Simple: I ran out of ideas.

When I sat down to design the Laboratory of the Beast, I brainstormed a bunch of ideas, reviewed the original brainstorming notes I had compiled when starting the campaign, and did a quick survey through some bestiaries for cool stuff I could include. Then I started mapping, jotting down which ideas went into which rooms as I went. Along the way I discovered some new ideas, and other stuff got thrown out when I discovered I didn’t actually like it or that it didn’t fit with how the rest of the complex was developing.

And then, somewhere down on the second level, my list of ideas had dwindled to almost nothing. So I collapsed the remaining tunnels. Then I went back up to the first floor and tweaked the map so that the collapse extended vertically, too.

WHY?

From a design standpoint, the primary reason to use this technique is when a particular dungeon concept requires a certain scale – “vast dwarven city”, “sprawling military laboratory”, “petrified remains of a demon so large its veins are corridors” – but in actual practice you’re not interested in spending the time necessary to explore the entirety of that scale.

This can also be true in a fractal sense: This complex should have had barracks for 500 men. It’s not difficult to map that, but searching 500 nondescript beds is boring, so drop a ceiling on most of the barracks complex and call it a day: The PCs will still be able to get a sense for how the dungeon functioned (“I guess these were the barracks”), but you bypass potential drudgery.

In general, collapsed tunnels also suggest age and imply danger. They can also create a sense of mystery. (And sometimes that mystery will be paid off if a collapse can be navigated or circumnavigated.)

In the dungeons of Castle Blackmoor, Dave Arneson used collapses in order to change the topography of the dungeon itself, thus altering the tactical and strategic properties of the megadungeon. Perhaps most easily used in campaign structures where the PCs are repeatedly re-engaging with the same dungeon complex, it’s also possible to sparingly use this gimmick by collapsing tunnels while the PCs are still inside the dungeon. In addition to the immediate peril of the collapse itself, the PCs will be posed with a new challenge as they try to figure out how to get back out of the dungeon. (There’s a scenario by JD Wiker in Dungeon #83 called “Depths of Rage” which uses this gimmick and which I ran to great effect in my first 3^rd Edition campaign.)

Collapses can also open passages that didn’t previously exist. And, in either capacity, they can serve as triggers: The dark dwarves who are invading the outer dwarven settlements because their own realms have been destroyed by a cataclysm. The breaching of an ancient eldritch prison. Deep goblins finding new pathways to the surface. And so forth.

AND WHAT IF?

One thing to be aware of when using collapsed tunnels is the possibility that the PCs will figure out how to excavate or bypass them. (This becomes particularly true as they reach higher levels and gain access to magical resources that can make this task increasingly trivial.)

It can be useful, therefore, to have some sense of what’s “back there” behind the collapse, just in case your players make it necessary for you to know. This is probably just good design advice in general, honestly, and you can see that with the examples above: I knew that there were more beast-themed laboratories beyond the collapses. When we dropped the ceilings on the barracks, we knew that they were barracks. These complexes weren’t just random assemblies of randomness; they were built (and inhabited) with purpose, and if you understand that purpose then you’ll just naturally know what’s behind the collapse.

Thinking about this too much, of course, is a trap. The odds of the PCs deciding to clear some random collapse are actually quite low, so going into any sort of detailed prep about what’s back there is almost certainly wasted prep and should be avoided. (It also likely negates the entire reason you collapsed those tunnels in the first place; i.e., to avoid prepping that stuff.)

BUT WAIT!

What if you want the PCs to excavate a tunnel and find a bunch of cool stuff behind it?

This can be tricky to reliably pull off. The natural reaction most people will have to seeing a blockade of solid stone is to go somewhere else. Most players will also be guided by the meta-knowledge that dungeon collapses rarely have anything mapped behind them, so the hard work of clearing all that rock is likely to be met with the GM literally stonewalling them.

(Pun intended.)

In order to overcome that natural and cultivated aversion, you’ll need to turn the area beyond the collapse into an attractor: You need to create a specific desire/need for the PCs to clear the collapse. For this, you’ll want to employ the Three Clue Rule: Old maps depicting the area beyond the collapse. Withered undead who murmur about lost riches. And so forth. Maybe it will become clear that whatever brought the PCs to the dungeon in the first place must lie beyond the collapse.

Get digging!

Session 15C: The Taint of Ghul

Ranthir suspected that the temple they had explored was a tainted place. It was also possible that some of the items they had taken from the Labyrinth were tainted themselves…

When I created the Western Lands setting for my first 3^rd Edition campaign, there was a Lovecraftian element I wanted to include and I decided to try modeling that element with a Call of Cthulhu-inspired Sanity mechanic.

Quick verdict here: This doesn’t work with D&D.

First, the D&D milieu already incorporates Lovecraftian elements, but does so through a distinct literary tradition descending from the sword and sorcery tales of Robert E. Howard and Clark Ashton Smith.

Second, D&D is an intensely and inherently violent game. Call of Cthulhu’s Sanity is calibrated to model the reaction to such violence realistically (with psychological devastation), but, once again, D&D’s treatment of violence is heroic and legendary in character.

It’s just a complete mismatch. I scrapped the Sanity rules.

Nonetheless, there was this aspect of the setting that I felt needed to pop mechanically in order to properly emphasize that it very specifically wasn’t just a traditional part of D&D’s kitchen sink of fantasy. This other order of beings that wasn’t just a different breed of monsters, but something inimical to the very fabric of reality itself.

When Unearthed Arcana came out, it included its own set of Call of Cthulhu-derived Sanity mechanics. I briefly incorporated those into my house rules document, but they never really made it into play. It was still clear to me that they weren’t going to work.

Unearthed Arcana, however, also included a separate mechanic referred to as Taint. This was much closer to what I wanted: Something that infected certain locations, objects, and characters. Something that basically allowed me to “tag” certain aspects of the game world and say, “This is bad mojo. This is Mordor. This is the broken symmetry. This is the singularity beyond which your perception of the world is cracked.”

And it basically worked. I found the rules from Unearthed Arcana a trifle overwrought, so I streamlined and simplified them when I incorporated them into my house rules, and they were brought fully online in the campaign immediately preceding In the Shadow of the Spire.

Later, Monte Cook published a sourcebook called Chaositech detailing a sort of steampunk-ish technology driven by chaotic energies. I thought the idea was really cool and wanted to incorporate it into the existing technomantic arts of my campaign world even before chaositech turned out to be an integral part of Cook’s Ptolus setting.

Chaositech, however, featured another overwrought system for the mutations and other effects suffered by characters wielding it. I realized that I could rip that whole set of mechanics out and basically plug in the Taint mechanics that were already part of my campaign.

Here, too, the taint worked: It created fear in the places where D&D characters typically don’t feel fear. And, in the case of chaositech, it created a clear and definite distinction which made it clear that these strange, technomantic machines weren’t just a simple substitute for magical items. They were something different. They were something other.

If anything, taint has proved a little too effective in the campaign: I thought there would some dabbling with chaositech. But the PCs want absolutely nothing to do with taint. In the current session they are only beginning to comprehend its jeopardy, but you’ll shortly see that the moment they identify something as tainted, they will immediately take steps to dispose of it.

Although that, too, would ultimately prove to have fascinating consequences.