Thunderclap (Recharge 4–6). The storm atronach causes a thunderous explosion using its action, any creature within 10 feet of the storm atronach must make a DC 14 Constitution saving throw, taking 2d10 thunder damage, being pushed back 10 feet and knocked prone on a failed save. Creatures that pass the saving throw take half as much damage and aren't pushed or knocked prone.   Explode on Death. The storm atronach causes a thunderous explosion upon its death, any creature within 10 feet of the storm atronach when it dies must make a DC 14 Constitution saving throw, taking 4d10 thunder damage, being pushed back 10 feet and knocked prone on a failed save. Creatures that pass the saving throw take half as much damage and aren't pushed or knocked prone.