Harm

Source: Player’s Handbook

6th-level necromancy

Casting Time: 1 action
Range: 60 feet
Components: V, S
Duration: Instantanous

You unleash virulent magic on a creature you can see within range. The target makes a Constitution saving throw. On a failed save, it takes 14d6 Necrotic damage, and its Hit Point maximum is reduced by an amount equal to the Necrotic damage it took. On a successful save, it takes half as much damage only. This spell can’t reduce a target’s Hit Point maximum below 1.

Classes: Cleric