Wall of Wind

You create a wall of wind on the ground at a point you can see within range. You can make the wall up to 30 feet long, 10 feet high, and 1 foot thick, or you can make a ringed wall up to 20 feet in diameter, 20 feet high, and 1 foot thick. The wall vanishes when the spell ends. The wall’s space is difficult terrain.

While behind the wall, you have full cover from ranged attacks. If a creature starts or ends their turn in it, or enters it for the first time on their turn, they must make a Strength saving throw against your spell save DC or be knocked prone. This effect only activates once per turn for each creature. You and up to 5 other creatures of your choice may pass through the wall, ignoring this effect as it splits before you.