Ward of Retribution

A creature you touch becomes shrouded in a holy ward. While this spell is active, the target regains 1d8 hit points the first time they are struck in combat each round. In addition, the creature that struck the target takes 1d8 radiant damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the healing and damage increases by 1d8 for each slot level above 3rd.