Bone Shield

Spectral bones whirl around your body for the duration. You can end the spell early by dismissing it as a free action. The bones provide you with a deathly shield or a divine shield, as you choose. The deathly shield grants you resistance to necrotic damage and the divine shield grants you resistance to radiant damage. In addition, whenever a creature within 5 feet of you hits you with a melee attack, the shield erupts with energy. The attacker takes 2d8 necrotic damage from a deathly shield or 2d8 radiant damage from a divine shield.