Death Frost
Hazard
Level 13 Obstacle
XP 800

Black frost creeps across the cold stone, hungry for the warmth of life.

Hazard: This hazard consists of an area of 2 to 5 contiguous squares. When a living creature moves adjacent to a square of death frost, the hazard grows outward.Perception     DC 21: The character spots the dark sparkling of light reflecting off a black sheet of frost on a surface.Arcana or Dungeoneering     DC 23: The character recognizes and identifies the danger before moving adjacent to the death frost.TriggerWhen a living creature enters a square adjacent to the death frost or starts its turn there, the hazard attacks.AttackOpportunity Action      Melee
Target: The triggering creatureAttack: +16 vs. FortitudeHit: 2d8+6 cold and necrotic damage.Miss: Half damage.Effect: The death frost increases in size to include the space of the triggering creature.Countermeasures     An attack that deals fire or radiant damage to a target in an area of death frost, or a burst or a blast that deals fire or radiant damage in an area of death frost, renders the entire hazard inert until the end of the attacker’s next turn.
     Thievery DC 23: A character can melt or scrape away the death frost in 1 square of his or her space by making a successful check as a standard action.
     A campfire or similar blaze destroys the death frost in its square and squares adjacent to it after an hour of burning.

Published in Underdark, page(s) 120.