Arcane Cataclysm

You cause an orb to plummet to the ground at a point you can see up to 1 mile away from you.

The orb creates a 5-foot-deep, 50-foot-radius crater on impact. Any creature in that radius must make a Dexterity saving throw, taking 14d6 force damage on a failed saving throw, or half as much damage on a successful one. All nonmagical structures in the crater are destroyed, as are all nonmagical objects that aren’t being worn or held. Magical structures and objects that aren’t being worn or held are damaged, but not destroyed outright. Constructions made primarily of mithral, adamantine, mizzium, diamond, or similarly durable materials are considered magical for this purpose.