Level variable Lurker
XP by previous form
A cacodemon can attempt to possess any creature within the area it haunts.Hazard: A cacodemon haunts an area proportional to the tier of its previous demonic form: 4 squares per side for heroic tier, 6 squares per side for paragon tier, or 8 squares per side for epic tier.Perception A cacodemon cannot be perceived until it attacks or takes on its mist form (see “Miss” below), at which point no Perception check is necessary to notice it.Arcana (trained only) Hard DC by level: The character can sense the cacodemon’s presence.Arcana or Religion Moderate DC by level, after the cacodemon attacks or takes on its mist form: The character identifies the cacodemon.Initiative variable; equal to that of the cacodemon’s previous formTriggerThe cacodemon rolls initiative and attacks when any creature enters its haunted area.AttackStandard Action Melee
Target: One creature in haunted areaAttack: Level of cacodemon’s previous form + 3 vs. WillHit: The target is dominated (save ends). First Failed Saving Throw: The target is still dominated, but it is no longer dazed as part of that condition. The cacodemon chooses all the dominated target’s actions. Second Failed Saving Throw: The cacodemon possesses the target (see “Demon-Possessed,” below). The possession ends when the target dies or the cacodemon is exorcised (see “Countermeasures” below).Miss: The cacodemon manifests as a misty essence in a square adjacent to the target. While in this form, the cacodemon can attack only creatures adjacent to it or in its square. Any creature can move through the cacodemon’s square freely. The cacodemon cannot move or be attacked or damaged. The hazard makes a saving throw at the end of each of its turns. On a save, this effect ends.Countermeasures If a cacodemon’s square comes within the protected area of a Forbiddance ritual, the cacodemon becomes inert until the end of the ritual. If the level of the cacodemon’s previous form is higher than the ritual caster’s level, Forbiddance has no effect on the cacodemon.
A character can exorcise a cacodemon possessing a creature by performing the Remove Affliction ritual. The cacodemon cannot attack the formerly possessed creature again for a year and a day. The affliction’s level is the level of the cacodemon’s previous form.
While the cacodemon is in its mist form, any creature adjacent to it that is trained in Arcana or Religion can make a check with one of those skills (hard DC by level). A successful check forces the cacodemon into a construct, a Magic Circle, or a magic item within 5 squares of the cacodemon.
Published in Demonomicon, page(s) 12.