Twister

You extend your hands in front of you and point to a spot or target that you can see within range, and a twister appears. The twister has a 15 foot radius and is 30 feet tall. The area of the twister becomes difficult terrain (including the air above it) and all targeted creatures must make a Strength saving throw against your spellcasting modifier.

On a failed save, the target takes 4d6 damage, and is knocked prone. On a success, the target takes half as much damage and remains upright.

Enemies that fail the save in midair are knocked to the ground and take the normal 4d6 damage, plus the appropriate fall damage.