Empathic Feedback

A protective magical force surrounds you until the end of your next turn that allows you to empathically share your pain and suffering with your attackers. For the duration of this spell, whenever a creature hits you with a melee attack, the creature takes 1d6 psychic damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the duration is 1 minute. If you use a spell slot of 4th level or higher, the duration is 10 minutes. If you use a spell slot of 5th level or higher, the duration is 1 hour. If you use a spell slot of 7th level or higher, the duration is 8 hours. If you use a 9th level spell slot, the duration is 24 hours.