Avalanche

An avalanche made from sheets of heavy, blinding snow manifests in a location you choose within range. The area of the storm consists of up to ten 10-foot cubes, which you can arrange as you wish. Each cube must have at least one face adjacent to the face of another cube. Each creature in the area must make a Dexterity saving throw. Any affected creatures take 7d10 cold damage on a failed save, or half as much damage on a successful one.

The massive amounts of snow make the surface beneath each chosen cube slick with rime, causing said surfaces to become difficult terrain until the snow melts at the start of the caster's next turn.