destabilize undead

For the duration,  Undead have Disadvantage on attack rolls made. You can end the spell early by using either of the following special functions.

Discharge. As a Magic action, the affected creature must succeed on a Charisma saving throw with advantage or be rendered immobile for a turn before exploding in a 5 feet radius, dealing 4d6 to itself and 1d6 to anyone at the edge of the explosion