Comet

A massive comet streaks down and explodes at a point you designate in range. Creatures within a 50-foot radius of that point must make a Dexterity saving throw. On a failure, they take 10d6 bludgeoning damage and 10d6 cold damage, and they are pushed 30 feet away from the point of impact, knocked prone, and are stunned until the start of your next turn. On a success, they take half as much damage and are not pushed, knocked prone, or stunned.