Detonate Corpse

You've learned how the gasses of living things can be detonated after they've died. As an action, you can cause target corpse that hasn't been dead for more than one hour, isn't a construct or undead, and was a small sized creature or larger to explode. Creatures within a 15 foot radius of the target must make a Dexterity saving throw. A target takes 1d10 necrotic damage and an extra 1d10 necrotic damage for each size category above small the corpse was on a failed save, or half as much on a successful save.