Elemental Avatar

This spell surrounds a willing target in an aura of elemental energy declared upon casting (Poison, Cold, Fire, Lightning or Thunder; If Cleric or Paladin, can also choose Radiant or Necrotic, alignment specific). This gives the target resistance to the element chosen. While this spell is active, if successfully attacked in melee, the spell does damage matching the elemental type chosen equal to 3D8 + spell casting modifier of the caster. 

At Higher Levels: When you cast this spell using a spell slot of 6th or higher, you gain 2D8 of the matching damage type chosen per level used.