Treacherous Ice Sheet
Level 5 Obstacle
A slick sheet of ice creates a hazardous obstacle.Hazard: This sheet of ice fills 10 contiguous squares, turning them into difficult terrain.Perception No check is necessary to notice the ice.Nature DC 22: 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: +8 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, Dungeon Magazine Annual, page(s) 9, H3 Pyramid of Shadows, page(s) 49.