Combust the Dead

You fill the body of one Medium or smaller dead creature you can see within range with fiery magic, causing it to explode in a burst of flame and bony shrapnel. Each creature within 10 feet of the body must make a Dexterity saving throw, taking 1d8 fire damage and 2d8 piercing damage on a failed save, or half as much damage on a successful one.

A body can be targeted by this spell only once. If the target body was dead for more than one week, the body is completely destroyed, and the creature can be restored to live only by means of a true ressurection or wish spell.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the fire damage increases by 1d8 for each slot level above 2nd.