Storm Shroud

Arcs of lightning wreathe your body for the duration, shedding bright light in a 10-foot radius and dim light for an additional 10 feet. You can end the spell early by using an action to dismiss it.

The lightning provides you with a shield that grants you resistance to lightning damage.

In addition, whenever a creature within 5 feet of you hits you with a melee attack, the shield bursts with electricity. The attacker takes 2d8 lightning damage.