Thin Ice
Hazard
Level 25 Obstacle
XP 7000

A slick sheet of ice isn’t as strong as it looks.

Hazard: The thin ice is difficult terrain (like the rest of the ice on the map), but it also collapses with more than a few pounds of weight on it.Nature     DC 26: The character identifies the squares of thin ice.Religion     DC 33: The character senses the presence of necrotic energy somewhere below the chamber.TriggerThe ice attacks when a creature enters it.AttackOpportunity Action      Melee
Target: Creature on the iceEffect: The ice gives way. The creature that triggered the trap immediately attempts a saving throw. If it succeeds, that character is prone in any adjacent square not in the thin ice area. If the saving throw fails, the creature is dunked into tainted, necrotically-infused water below the ice, taking 20 poison damage and 20 necrotic damage. At the start of every turn in the water, the creature takes an additional 20 poison damage and 20 necrotic damage.Countermeasures     Fire damage: If thin ice squares are within the area of any fire attack, the ice collapses, even if there was no weight upon it.

Published in Dungeon Magazine 175, page(s) 34.