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GENERAL CONDITIONS

There are a few things to keep in mind as the PCs are exploring the flying fortress.

Announcements: There are frequent announcements that can be heard throughout the ship. They include things like:

• Summons for particular devils to go to various places. (“Signifier Yurtarth, report to the abjuration generator.”)
• Navigational announcements. (“Prepare for acceleration.”)
• Personnel announcements, like shift changes, mess calls, or general quarters. These can include obscure references like “condition omega” or “enact red protocol.”
• Blaring alarm klaxons (if, for example, the PCs trigger an alert).

All verbal communication, of course, will be in Infernal.

Telepathic Communications: Are likely to be jammed by the Telepathy Station.

Teleportation: Is blocked by the Abjuration Generator.

Scrying: Is blocked by the Abjuration Generator.

ENTRANCES

ROOFTOP HATCH: Found on the Lookout Deck (see Locations, below).

SIGNAL VENTS: Tiny hatches on the hull connect to 1-foot-diameter chutes that lead to the Imp Roosts. Imp couriers use these chutes to enter and exit the flying fortress.

• Can be accessed by Tiny or gaseous creatures.
• Vent Labels in Infernal indicate if a vent is intake or exhaust (to avoid imps having head-to-head collisions).
• There is a chance of encountering an imp when the vents are used: 1 in 10 when ship is in dock; 1 in 8 when ship is in the field; 1 in 4 when ship is in battle. (PCs observing the vents – and able to see the potentially invisible imps – may be able to discern a traffic pattern to reduce or eliminate the possibility of encountering an imp.)

SOUL INTAKE PIPE: Grilled vent on the bottom of the fortress, just above the ventral battery, leading to a 5-foot-diameter pipe.

• Pipe leads to a 10-foot-diameter, spherical iron cistern.
• Souls from the River Styx are drawn up into the flying fortress when it is docked at the Stygian Dock and used for fuel in the cistern.
• The pipe and cistern are flooded with necrotic energy, and any creature starting its turn in either location takes 16 (3d10) necrotic damage.
• The cistern is located in the Engine Room, and there is a maintenance hatch allowing access. From the inside, there is no handle, but it can be broken open (DC 20 Strength check). This will also flood the Engine Room with necrotic-infused soul fuel.

LOWER PERCH: It’s not unusual for one or two of the lower perches to be open during flight to allow flying devils to come and go, so it’s often possible for the PCs to simply fly in (if they can somehow avoid being detected by the devil legionnaires on security duty and also actively working throughout the perch).

UPPER PERCH: The Upper Perch is generally not open except during an actual deployment. The doors can be raised or lowered from a control room at the back of the bay.

Go to Part 7D-C: Fortress Locations

(click for large map)

This map is designed for use with Part 7D: Raid on the Flying Fortress. You can download a large version without labels for VTT use by clicking the image.

Go to the Avernus Remix

(click for large map)

This map is designed for use with Part 7D: Raid on the Flying Fortress. You can download a large version without labels for VTT use by clicking the image.

Go to the Avernus Remix

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AVERNIAN ENCOUNTER DISTANCE

As described in Part 7B: Avernian Hex Map, the Avernian Hexcrawl features unique terrain types. You can use the following table to determine encounter distance in Avernus.

AVERNIAN REACTION TABLE

Reaction checks in Avernus are made by rolling 2d6 on the following table.

If you roll doubles, however, the encounter’s reaction will be deceptive, in which case the encounter’s reaction will appear to be the opposite result on the table:

• Immediate Attack/Hostile encounters will appear incredibly friendly and welcoming… right up until they slip the knife in.
• Threatening encounters will appear cautious, most likely using that posture to put the PCs at a disadvantage. (“Your weapons scare me! Put them down and we can talk!”)
• Cautious encounters will attempt to scare the PCs away with a display of dominance.
• Neutral encounters are unchanged.
• Amiable encounters will present behavior that seems overtly hostile, but most likely due to cultural differences. (The demon is brandishing its venom-glistened fangs at you so that you’ll see that it’s having its venom sacs discharge a clear fluid instead of poison!)

Deception is possible in any setting, of course. By having it systemically occur one-sixth of the time in Avernus, our goal is to leave the players feeling unsettled and uncertain. Hell is an alien environment filled with lies and liars.

FACTION ALLEGIANCE TABLE

Devils encountered in Avernus will usually belong to or be allied with a faction. (Hell is all about its hierarchies.) You can randomly determine an encounter’s faction using this table.

Go to Part 7I: Avernian Rumor Tables

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PROCEDURAL ENCOUNTER TABLE

Tip: The Procedural Encounters table will generally produce homogenous encounters with only a single creature type. Although it requires more dice rolling (and some creative interpolation to explain the results), you can quickly generate mixed encounters by rolling twice and halving the number of creatures of each type appearing (round up).

You may discover that it’s actually easier to improvise creative encounters by generating mixed results, because the pairing of different devil types will spur your creativity in explaining what they’re doing together.

STYX ENCOUNTERS

ENVIRONMENTAL ENCOUNTERS

ROCKS OF THE DAMNED: Some of the rocks in Avernus seem to have tormented faces etched into them.

BONEFIELD: A field of bleached bones lying half-buried in the dunes or choking a razor-sharp ravine These are remnants of some ancient battle. (Avernian bonefields often feature titanic skeletons that will tower over the PCs.)

AVERNIAN FIREBALLS: Travelers in Avernus are periodically plagued with balls of flaming energy that spontaneously erupt without apparent reason. They inflict 5d6 fire damage, with a DC 15 Dexterity saving throw for half damage.

INFERNAL WRECK: 1d3 wrecked infernal war machines. The PCs can likely scavenge parts from them. There’s a 1 in 6 chance that the machine can be repaired without completely overhauling it.

OPPRESSIVE CONDITION: Trigger an oppressive condition, as described in Part 7B. This will exist in addition to any oppressive conditions already present.

AVERNIAN WARLORDS

See Part 7E: Warlords of Avernus for more details on the warlords. You can roll on the table below to randomly determine which warlord’s faction has been encountered. There is a 1 in 4 chance that the warlord is present for the encounter, otherwise it’s just an appropriate squad of their gang members (most likely riding infernal war machines).

DANGEROUS DEVILS

Go to Part 7H-D: Advanced Encounter Options