Ashen Corpse Haunt CR 8
CN haunt (15-ft.-radius centered around humanoid ash pile)
Caster Level 8th
Notice Perception DC 28 (to see a humanoid pile of cinders subtly move)
hp 16; Trigger proximity; Reset 1d4 days
Effect The ashen corpse haunt targets the first creature to approach within 15 feet of the pile of cinders. The ashen corpse rises and the nearest creature to the haunt must make a DC 22 Will save or switch souls with the deceased creature (otherwise this effect functions as the magic jar spell). The effect lasts until the ashen corpse haunt resets 1d4 days later, the ashen corpse is destroyed, or the pile of cinders is scattered by a wind effect of 50 mph or greater.
Destruction The ashen corpse haunt can be permanently destroyed by scattering the remains of the ashen corpse with a 50 mph or greater wind effect as they are cleansed by a fire-based effect (such as burning hands, fireball, and other fire-based spells with an area of effect). Once disrupted or destroyed any soul trapped in the ashen corpse is returned to his body.
The ashen corpse haunt is a relic made by one of many victims to fall to the Transgression’s deadly passing, an unfortunate soul cursed to rise as a horror of cinders every 1d4 days only to suffer its death again and again. Driven mad, the ashen corpse seeks any escape—even if only temporary—and attempts to possess any creature that wanders near it.
[Submitted by Rory Toma!]