Darastrix's Repurpose Minion

The caster utters a powerful incantation, targeting one of their own minions created through the use of the Animate Dead, Create Undead, or Finger of Death spells. The targeted minion explodes, immediately destroying it. Creatures within a 20-foot-sphere centered on the targeted minion must make a Constitution saving throw. Creatures take 10d8 necrotic damage on a failed save, or half as much on a successful one. Creatures which fail their save are also poisoned and deafened for the next round of combat.

This spell cannot be cast if the caster has no minions under their control.