Falling Blocks
Area
Level 5 TrapXP 200

Detect Perception DC 22

Initiative -

Immune attacks

Triggered Actions

Attack Encounter

Trigger: A living creature enters the 10-foot-square midpoint of the 50-foot-long passage.

Effect (Immediate Reaction): Two blocks of stone drop from the ceiling to seal off both ends of the passage. The falling blocks attack creatures in those squares.

Attack: ; +8 vs. Reflex

Hit: 2d8 + 4 damage, and the target is pinned underneath the block (escape DC 22). Until it escapes or the block is lifted, the target is prone, restrained, and takes ongoing 5 damage. If the target escapes, it moves into a space of its choice adjacent to the block as a free action.

Miss: The target moves into a space of its choice adjacent to the block as a free action.

Countermeasures

Disable: Thievery DC 22 (standard action). Requirement: The character must not be adjacent to the 10-foot-square section in the middle of the passage. Success: The trap is disabled for 1 hour.

LIft: Athletics DC 22 (standard action). Requirement: The character must not be restrained. Success: The character lifts the fallen block and resets the trap.

Published in Halls of Undermountain, page(s) 78.