Corpse Explosion

Reaching out with your hand you can cause a corpse of a recently slain medium or smaller creature within 30 feet to bloat and swell to critical mass. Each creature in a 15-foot radius sphere must make a Dexterity saving throw. A creature takes 3d8 bludgeoning or necrotic damage (chosen when casting the spell) on a failed save, or half as much damage on a successful one. Your mastery over death makes you immune to the damage of this spell if you are in range.

The remains exist after but can no longer be used for this spell.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.