Lava Flume Tubes
Sealed stone channels vomit molten rock the instant an exit is tried, flooding a chamber with rising, ever-deepening lava.
A chamber laced with channels that vomit molten rock the moment anyone tries to leave, flooding the floor with rising lava. Every turn the room grows hotter and the way out shrinks.
Flume Activation [Reaction] Trigger A creature tries to leave the room.
Routine (4 actions) The trap loses 1 action per disabled channel each turn. On each action, a different channel spews lava, dealing 4d6 fire damage to each creature within 10 feet of the channel (DC 27 basic Reflex save), and increasing the depth of the lava in the room by 1 foot (4 feet per round if all the channels are active).
Level 10 · Complexity Complex
Stealth +19 (trained)
Disable
- Thievery DC 29 (expert) — (expert) to block a channel, or Thievery
- DC 31 (master) — (master) to release the floor latch and escape to the chamber below
AC 30
HP 48 · Hardness 12
Immunities critical hits, object immunities, precision damage
Effect The exits seal instantly and the trap rolls initiative.
Reset The trap deactivates and resets after 1 hour by withdrawing the floor, cracking and dumping the hardened lava (and any creatures trapped inside) into the chamber. Creatures fall 40 feet, taking falling damage (typically 17 bludgeoning damage).