Blizzard

Until the spell ends, freezing rain and hail fall in a 20-foot-tall, 40-foot-radius cylinder centered on a point you choose within range of the spell. The area becomes heavily obscured, and exposed flames in the area are doused.

The ground in the area is covered with slick ice, becoming difficult terrain. When a creature enters the spell’s area for the first time on a turn or starts its turn there, it must make a Dexterity saving throw. On a failure, it falls Prone.

If a creature is concentrating on a spell in the area, it must succeed on a Constitution saving throw against your spell’s DC or lose concentration.