Divine Reprisal

As a bonus action, you can infuse a shield you're currently wielding with divine energy. If the shield is not magical, your AC increases by 1 until you stop wielding the shield or the spell ends. The first time a creature targets you with a melee attack and misses during this spell's duration, your shield bursts with divine radiance as you deflect the blow. The stored energy within releases and deals 1d6 radiant damage to any hostile creatures within 5 feet. When this blast hits an undead or a fiend, it deals an additional 1d6 radiant damage to it. After the blast, the spell ends.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the radiant damage dealt by the blast increases by 1d6 for each slot level after the 1st.