Ashes

You touch a Medium-sized or smaller corpse and undo the residual life energies that hold its form together, reducing the corpse to fine ashes and leaving any equipment it might be wearing behind. This spell has no effect on constructs or undead.

A corpse affected by this spell cannot be turned into a corporeal undead but also cannot be brought back from the dead except by a true resurrection or wish spell.

This spell can affect Large corpses when you reach 5th level, Huge corpses at 11th level, and Gargantuan corpses at 17th level.