Thunderous Crash

Raising your hand up into the sky, you let loose a burst of electrical energy. In not too long, searing lightning crashes down on the point you chose.

Three turns after casting the spell, a bolt of lightning crashes down from the sky, dealing 10d12 lightning damage in a 10 foot radius around a point you chose when you cast it. The impact of the blast creates a loud boom of thunder that can be heard for 500 feet in all directions, and can be heard through walls. The targets of the spell can't see where the spell would land by any nonmagical means, and the user can't change the target after casting.