Avalanche

You summon a cascade of snow, ice, and small bits of debris in a 25 foot square originating from you.. Each creature in that area must make a Dexterity saving throw. On a failed save, a creature takes 2d10 bludgeoning damage and becomes trapped in the avalanche. If a creature is trapped in the avalanche at the end of its turn, it takes 2d6 cold damage. A trapped creature can use it's action to make an Athletics or Acrobatics check against your spell save DC. On a successful save, a creature takes half as much damage and isn’t trapped Until the spell ends, you can use a bonus action on your turn to move the avalanche up to 30 feet in a single direction. Any creature that the avalanche moves over must make the Dexterity saving throw or take the damage. If a creature is trapped in the avalanche when it moves, it takes the damage, no saving throw required.