Sudden Putrefaction

5th-level necromancy

Casting Time: 1 action

Range: 60 feet

Components: V, S

Duration: Instantaneous

You cause the decomposition of an undead target to suddenly and greatly accelerate from the inside. The corpse’s innards liquefy and gasses bloat its frame. One corporeal undead creature within range that you can see must attempt a Constitution saving throw. It takes 5d8+20 acid damage on a failed save, or half as much damage on a successful one.

An undead destroyed by this spell explodes violently as putrefying gases burst its body apart. All creatures adjacent to the destroyed undead must succeed on a DC 15 Dexterity saving throw or take 1d6+1 points of acid damage.