Animus Bane

You attempt to curse a creature other than construct or undead, causing its life force to turn against it. The target must make a Charisma saving throw. On a successful save, the creature takes 4d8 necrotic damage and the spell ends. On a failed save, the creature takes 8d8 necrotic damage and is cursed for the duration. While cursed, the creature cannot regain hit points, its movement speed is halved, and it cannot take reactions. A creature can use its action on each of its turns to attempt to repeat the saving throw, ending the effect on a success. The spell can also be ended by greater restoration, heal or wish. Regardless of how the spell ends, whenever this spell ends on a creature, that creature takes an additional 4d8 necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot above 5th.