Demonic Slime
Level 16 Obstacle
XP 1400

Wherever demons congregate for long, you are bound to find this sticky red slime that smells strongly of rot and the bitter iron tang of blood.

Hazard: A pool of demonic slime fills up to 5 contiguous squares. This sticky substance is difficult terrain.Perception     No check is necessary to notice demonic slime.Arcana     DC 25: The character identifies this strange pool of viscous red liquid as a pool of demonic slime.TriggerThe demonic slime attacks when a creature enters or starts its turn within the area of the slime.AttackOpportunity Action      Melee
Target: Creature in the demonic slimeAttack: +20 vs. WillHit: The target is dominated. The target must attack an adjacent creature or charge the nearest creature. If the target can do neither action, the target stands in the square dumbfounded, granting combat advantage to all creatures until the start of the target’s next turn (or until it saves).Countermeasures     Demonic slime is immune to all but radiant damage. Each square of demonic slime has AC 5, Fortitude 10, and 30 hit points.

Published in Manual of the Planes, page(s) 23.