Wind Wall

3rd-Level Evocation
Casting Time: 1 action
Range: 120 feet
Components: VSM (a tiny fan and a feather of exotic origin)
Duration: (C) 1 minute

A wall of strong wind rises from the ground at a point you choose within range. You can make the wall up to 50 feet long, 15 feet high, and 1 foot thick. You can shape the wall in any way you choose so long as it makes one continuous path along the ground. The wall lasts for the duration.
When the wall appears, each creature within its area must make a Strength saving throw. A creature takes 3d8 bludgeoning damage on a failed save, or half as much damage on a successful one.
The strong wind keeps fog, smoke, and other gases at bay. Small or smaller flying creatures or objects can't pass through the wall. Loose, lightweight materials brought into the wall fly upward. Arrows, bolts, and other ordinary projectiles launched at targets behind the wall are deflected upward and automatically miss. (Boulders hurled by giants or siege engines, and similar projectiles, are unaffected.) Creatures in gaseous form can't pass through it.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you may increase its length or height by 10 feet or increases its damage by 1d8 for each slot level above 3rd. for each slot level above 3rd.

Source: PHB 288, SRD