Spell Smite: Divine smite for Spells

Beginning at 6th level if you are a paladin or multi classed into the class, when you hit a creature with a spell that requires a spell attack roll, you can now smite the target with said spell, dealing radiant damage in addition to the spell's damage. The extra damage is a number of d8s equal to the spell level you cast.

You can use this feature a number of times equal to your Charisma modifier (a minimum of once). You regain any expended uses when you finish a Short rest.