Avalanche

Snow, rocks and ice fall from a point you choose within range and continue to expand and grow larger and larger finally developing into an unstoppable wave of icy destruction. Each creature in a 20-foot cone from the point  the avalanche began must make a Dexterity saving throw. A target takes 8d6 bludgeoning damage on a failed save, or half as much damage on a successful one.

The avalanche makes the terrain difficult for any area it touches.

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.