Darastrix's Elemental Wrath

You unleash the power of the elements in a 100 ft cone. Creatures within that area must succeed a dexterity saving throw or take 8d12 acid damage, 8d12 cold damage, 8d12 fire damage, 8d12 force damage, 8d12 lightning damage, 8d12 poison damage, and 8d12 thunder damage, or half as much on a successful one.