The amaru magically calls down a bolt of lightning from above to a point within 120 feet it can see. Each creature within 5 feet of that point must make a DC 18 Dexterity saving throw. A creature takes 44 (8d10) lightning damage on a failed save, or half as much damage on a successful one. Outdoors in stormy conditions, the increases to 49 (9d10) lightning damage.