Curse of Predation

The target must make a wisdom saving throw.  If they fail, you have advantage on all attacks against them, and may reroll damage once per turn against them for the duration of the spell.  You must take the result of the second roll.

This spell can only be dispelled by a  remove curse cast on the target.

If you cast this spell using a spell slot of 4th level or higher, the duration is concentration, up to 10 minutes. If you use a spell slot of 5th level or higher, the duration is 8 hours and doesn’t require concentration.  If you use a spell slot of 7th level or higher, the duration is 24 hours.  If you use a 9th level spell slot, the spell lasts until it is dispelled.