Corpse Detonation

Select a corpse within range that you can see that has been dead no longer than 1 minute the corpse explodes all creatures within a 5ft radius make a dex save on a fail they take 2d8 necrotic damage as the corpse explodes covering them in viscera, on a sucsess they take half as much. The spell at first level may only be cast on medium or smaller corpses. Upcasting for each level above first adds and extra 1d8 damage aditionaly it allows you to target a corpse 1 size larger than medium per level above fist. Damage is increased by 1d8 for each size above medium at 5th level you can target 1 aditional corpse.