Avalanche

A jagged chunk of ice and snow launches from your fingertip toward a point within range. It explodes into a massive burst of freezing shards. Each creature in the 20-foot-radius sphere must make a Dexterity saving throw. On a failed save, a target takes 8d6 cold damage, or half as much on a successful one.

The icy blast sweeps around corners. It extinguishes all open flames in the area.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.