Tasarnis' Conduit of Wrath

You invoke the Wrath of the Unbridled Storm and make the creature touched the focal point of, and conduit for the divine's energy.   Until used 4 times or concentration ends, when the target is struck by a physical attack, a blast of electrical energy arcs out towards the attack's source, dealing 1d8 Lightning damage to the attacker, if they are within 15 feet. If the attack is made with a non magical, metal weapon the attacker takes double the damage. If the attacker is out of the range then the effect is wasted.