Day Shield

You create a bubble of radiant light around you that follows you wherever you move. When you cast this spell, make a melee spell attack against a creature within 5 feet of you. On a hit, the target takes 1d6 radiant damage.

While this spell is active, each time you take damage from a melee spell or attack, reduce the damage you take from that attack by 5 and deal radiant damage to whoever made the attack equal to 1d6 + your spellcasting modifier.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d6 and the damage reduction is increased by 5 for every spell slot level above 5th.