Vileshadow Mist
Trap
Level 24 Obstacle
XP 6050

The area begins to fill with shadowy mist, which dims the light as it induces nausea and growing despair.

Trap: The mist starts in a 2-square cube, and it expands 3 squares in every direction each turn until it fills the designated area.Perception     No check is required to notice the mist.Arcana     DC 29: The character recognizes the nature of the mist.TriggerWhen a creature starts its turn in or enters a square that contains the trap’s effect, the trap attacks.Attack • Necrotic, Poison, ZoneOpportunity Action      Melee
Target: Triggering creatureAttack: +28 vs. FortitudeHit: 2d8 + 8 necrotic and poison damage, and the target is slowed (save ends).Miss: Half damage, and the target is not slowed.Effect The gas lightly obscures its area. It makes bright light dim, and it makes dim light dark.Countermeasures     Endurance DC 26: A character can hold his or her breath well enough to avoid the effect of the gas for 1 round.
     Dispel magic against Will 37 forces the trap to start over form its original starting point.

Published in Dungeon Magazine 160, page(s) 74.