The Damballa Spell is an arcane and forbidden form of voodoo magic used to call forth the power of the ancient voodoo sky god Damballa. Used with the Heart of Damballa, a magical amulet, one can transfer their soul into anything.
Once transferred, the only way they can change body is to transfer their soul into the first person they revealed themselves to. If they stay to long in an inanimate object, they will become mortal and trapped inside.