Burning Vapor
Level 11 Obstacle
XP 600

Clouds of burning vapor are common on the Elemental Chaos. These mixtures of elemental fire and air inexplicably wander far and can be found throughout the planes.

Hazard: A field of burning vapor fills 10 contagious squares. Creatures within the burning vapor gain concealment.Perception     No check is necessary to notice burning vapor.Arcana     DC 16: The character identifies the strange orange and red swirling mist as burning vapor.TriggerThe burning vapor attacks when a creature enters or starts its turn in a field of burning vapor, burning body and lungs.AttackOpportunity Action      Melee
Target: Each creature in the burning vaporAttack: +14 vs. FortitudeHit: 2d8 + 6 fire damage, and ongoing 5 fire damage (save ends), and the burning vapor moves 3 squares in a random direction.Countermeasures     A character successfully holding his or her breath in burning vapor does not take ongoing fire damage on a hit.
     A zone created with the cold keyword (such as the 9th level wizard spell ice storm) destroys squares of burning vapor within it.

Published in Manual of the Planes, page(s) 22.