Blighnting

You blast foes with vicious red lightning, charged with holy energy. Each creature in a 30-foot cone must make a Dexterity saving throw or take 6d6 lightning damage and 6d6 radiant damage. A living creature that fails the save is suffused with radiant energy. Whenever such a creature regains hit points or gains temporary hit points, it instead goes to the caster.

At higher levels. When you cast this spell using a spell slot of 8th level or higher, the lightning damage and the necrotic damage each increase by 1d6 for each slot level above 7th.