Treacherous Ice Sheet (Elite)
Hazard
Level 5 Elite Obstacle
XP 400

A slick sheet of ice creates a hazardous obstacle.

Hazard: This sheet of ice fills 20 contiguous squares, turning them into difficult terrain.Perception     No check is necessary to notice the ice.Nature     DC 24: The character identifies the squares of treacherous ice.TriggerThe ice attacks when a creature enters or begins its turn in a square of treacherous ice. It also attacks when a creature stands up from prone in a square of treacherous ice.AttackOpportunity Action      Melee
Target: Creature on the iceAttack: +10 vs. ReflexHit: 1d6 + 2 damage and fall prone. If the creature is already prone, no damage but its turn ends immediately.Countermeasures     Acrobatics DC 27: With a successful check and a move action, a character can move into a square of treacherous ice without risk of falling. If the check fails or the character move more than 1 square, the ice attacks.

Published in Dungeon Master's Guide, page(s) 89.