Corpse Explosion

A corpse that you can see within range decays suddenly and explodes in a shower of viscera. Each creature within 10 feet of the corpse must make a Dexterity saving throw. On a failure, a target takes an amount of bludgeoning damage determined by the size of the exploded corpse, or half as much on a success. A Tiny corpse deals 4d4 damage, Small corpses deal 4d6, Medium corpses 4d8, Large 4d10, Huge 4d12, and Gargantuan 4d20.