The water in this room should be a sign of what fate awaits those who step into this room. After 30 seconds, the doors drop shut and water starts to pour into the room. The time between the trigger and the springing of the trap is time wherein Sprugtooth must try hard to stop from smiling.
Detect: Per-based Traps at -1.
Disarm: DX-based Traps at -4. Failure triggers.
Circumvent: DX at -5 lets you move through the room without triggering the trap. If you know about the trap, it's automatic (don't stay in the room).
Evade: Hearing at -2 allows Dodge at -2 to jump through the shutting doors for those right next to them.
Effects: After 30 seconds, the doors to the room shut and the 3-hex by 3-hex room fills with water, drowning (p. B354) everyone in room.