Blizzard

You conjure a 60-foot-radius sphere of howling winds, biting cold and swirling snow centered on you. The area is considered heavily obscured for any creature inside the area other than you. Any creatures of your choice inside the area when the blizzard appears, or who begin their turn inside of it, must make a Constitution saving throw. On a failed save, a creature takes 8d8 cold damage and has its speed halved until the beginning of its next turn. On a successful save, a creature takes half damage and suffers no reduction to its speed.

A creature cannot take damage from this spell more than once per turn.