The Last Crucible

A killing chamber of obsidian and fire — a pressure plate drops slabs of black glass to seal the room while three spouts vomit molten lava across the floor.

Drop the Wall [Reaction]

Disable Thievery DC 28 (expert) to disable the main pressure plate at area H4a and deactivate the trap entirely (this causes the obsidian walls to retract up into the ceiling as well), Thievery DC 25 (trained) to disable one of the three lava spouts, or Athletics DC 28 (trained) to Force Open a fallen obsidian wall.

Level 6 · Complexity Complex

Stealth +15 (expert)

Disable

• Thievery DC 28 (expert) — (expert) to disable the main pressure plate at area H4a and deactivate the trap entirely (this causes the obsidian walls to retract up into the ceiling as well), Thievery
• Athletics DC 25 (trained) — (trained) to disable one of the three lava spouts, or Athletics
• DC 28 (trained) — (trained) to Force Open a fallen obsidian wall

AC 22

HP 58 · Hardness 15

Immunities critical hits, fire, object immunities, precision damage

Trigger Four or more Small or larger creatures walk onto the pressure plate at area H4a

Effect A magically hardened sheet of obsidian drops down like a portcullis in the western and northern entrances to this room that lead to areas H3 and H5, respectively.

Reset The Last Crucible deactivates and resets 10 minutes after it has no target creatures (because the creatures either left area H4 or died). Any thoqquas that still live sense the magma river at area H6 and eventually make their way north to that area to swim away.