Phantom Body

You touch a humanoid and transform its body into a phantom. For the duration, the creature is counted as undead; it stops aging; its body becomes spectral; it can move through solid objects and creatures; it has a flying speed of 40 ft; and it gains the following features:

Damage Resistances. acid, fire, lightning, thunder, bludgeoning, piercing, and slashing.

Damage Immunities. cold, necrotic, poison.

Condition Immunities charmed, exhaustion, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained.

When it makes an attack, it deals additional necrotic damage equal to 3d6 and restores hit points equal to the highest of the d6 rolls.

If it finishes its turn inside a solid object, it takes 2d10 force damage; the spell ends early, and it is teleported into the nearest unoccupied space.