Yeshe's Corpse Bomb

The corpse of a recently deceased creature rapidly bloats at your command and erupts in a gruesome yet demure explosion. You target the corpse of a creature that's been dead for no longer than 1 minute that you can see within range, detonating it. Each creature within a 10-foot radius sphere centered on that corpse must make a Dexterity saving throw. A target takes 2d8 force damage on a failed save, or half as much damage on a successful one. The size of the explosion increases by 5 feet for every size larger than medium.

If an ally is within range of the explosion and succeeds on their Dexterity saving throw, you may choose to instantly prestidigitate the gore off of them. If you choose not to, the allied target has a brief intrusive thought of a smug, god-like figure covering his mouth with a robed sleeve and snickering at them.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 1.