Eithril Nova

You focus on your teachings from in the Eithril; bringing your hands close together next to your abdomen focusing on creating dark energy. As you conjure this orb of destructive energy you begin to rise in the air. Once it’s fully charged you hurl the orb of dark energy at a target that you can see. On a hit, the target takes 2d10 of radiant damage, or half as much on a successful Dexterity saving throw.