Venomous Floor (Elite)
Trap
Level 10 Elite Obstacle
XP 1000

A stretch of hallway is lined with hidden needles that shoot forth from the gaps in the carvings (usually the mouths).

Trap: Needles attack any creature that enters or begins its turn in a trapped square.Perception     DC 19: The character can discern all adjacent needle holes.Religion     DC 21: The character identifies the important areas in Dagon’s iconography, granting the party a +2 bonus to Perception checks to notice the trapped squares.TriggerWhen a creature enters or begins its turn in a trapped square, the trap attacks that creature.AttackOpportunity Action      Melee 1
Target: Creature on a trapped plateAttack: +13 vs. FortitudeHit: 2d8 + 6 poison damage and the target is immobilized until the beginning of its next turn.Miss: Half damage and slowed until the end of its next turn.Countermeasures     Athletics DC 5 or Athletics (without a running start) DC 10: A character who makes a successful check can jump over a single plate.
     Thievery DC 10: An adjacent character can delay a trigger plate with a successful check.
     Thievery DC 21: An adjacent character can disable a trigger plate with a successful check.

Published in Dungeon Magazine 156, page(s) 96.