Debilitating Portent

4th-level divination

Casting Time: 1 action

Range: 120 feet

Components: V, S, M (holy symbol or an item related to a warlock’s pact)

Duration: Concentration, up to 1 minute

Classes: cleric, warlock

You surround the target with a glowing green aura of ill-fated prophecy that fills its mind with tangled visions of possible futures, causing it to commit missteps and errors even as it tries to avoid those misfortunes. Each time the target attempts to attack or cast a spell, it must succeed on a Wisdom saving throw. On a failed save, it has disadvantage on attack rolls made as part of that attack or spell and targets have advantage on their saving throws. In addition, the spell or attack deals only half normal damage.

If the target scores a critical hit with its spell or attack, you can end the debilitating portent as a reaction, causing it to be resolved as a normal spell or attack but dealing half normal damage.