The Archive of Esoteric Secrets

Nox's Inhabiting Darkness

6-level Transmutation

You transform into a bolt of dark energy and fly forward towards a creature within range. If the creature is not willing, it must succeed on a Charisma saving throw or be possessed by you until the spell ends. Undead and constructs are unaffected. The possessed creature acts normally, but whenever they move, you move as if you were in their space. Whilst you are possessing a creature, you are untargetable, and are immune to all damage.   Whenever the spell ends, be it due to loss of concentration, or you willingly ending concentration on the spell, you burst forth from the creature in a violent explosion, appearing in an unoccupied space within 20 feet of them. Each creature except you within the area must then succeed on a Constitution saving throw or take 10d8 necrotic damage, taking half on a success. If the creature willingly allowed you to possess it, it succeeds the saving throw automatically.
At higher levels: When you cast this spell using a spell slot of 7th level or higher, the damage dealt increases by 2d8 per spell slot level expended above 6th.