Circuitry Cloak

This sleek, metallic cloak is interwoven with glowing circuits and gears. While wearing the Circuitry Cloak, you gain a +1 bonus to AC and advantage on saving throws against being paralyzed or poisoned. Additionally, once per long rest, you can activate the cloak's energy field as a reaction when you take damage. This reduces the damage you take by 1d10 + your Constitution modifier and charges the cloak's energy. If you reduce damage in this way, the cloak can store this energy and can release a 30-foot burst of electrical energy on your next turn. Each creature of your choice in that area must make a DC 15 Constitution saving throw, taking 3d6 lightning damage on a failed save, or half as much on a success. The cloak can store this energy a maximum of three times before needing a long rest to reset.