Golden Mist
Level 18 Blaster
XP 2000

Gleaming golden mist hovers throughout the cavern.

Trap: The magic of the mist threatens to turn friends against one another in brutal violence.Perception     No check is required to notice the mist.Arcana     DC 28: The character feels the presence of charming magic within the mist.Trigger       When a living creature not already dominated by the mist ends its turn within the mist, the mist attacks.
Attack * CharmOpportunity Action      Area burst 1 centered on the triggering creature
Target: Each creature in burstAttack: +19 vs. WillHit: The target is dominated (save ends). Second Failed Saving Throw: The target becomes controlled by the trap and gains the chaotic evil alignment. He or she continues to act as dominated victims do (see below), but is no longer dazed and can make use of any powers and abilities. The target can be restored to normal with the Remove Affliction ritual or (possibly) by the disabling of the trap.Special: Dominated creatures attempt to slay any creatures that are not already dominated or controlled by the trap, and they pursue creatures into location 19. If they are drawn into location 19, they focus on creatures trying to disable the trap.Countermeasures     The trap’s magic is connected to the various runes scrawled on the walls of location 19. A character can make a DC 24 Perception check to identify the correct runes only after he or she is aware that the trap exists. Once the runes are identified, a character can make a DC 25 Arcana check or Thievery check while in location 19 to disable the trap.
     If the trap is disabled, each dominated and trap-controlled individual can make a saving throw with a +5 bonus. On a save, the creature is no longer dominated or controlled, and its alignment and behavior return to normal. On a failed saving throw, the creature continues to attack prior allies, and only a Remove Affliction ritual can negate the effect.
     A successful use of dispel magic against a Will of 30 causes the mist to instantly disappear, and its domination and control effects end.

Published in Tomb of Horrors, page(s) 107.