Thunderwall

You create a wall of thunderous clouds on a solid surface within range. You can make the wall up to 60 feet long, 20 feet high, and 1 foot thick, or a ringed wall up to 20 feet in diameter, 20 feet high, and 1 foot thick. The wall is opaque and lasts for the duration.

When the wall appears, each creature within its area must make a Dexterity saving throw. On a failed save, a creature takes 6d8 thunder damage, or half as much damage on a successful save.

Upon entering the wall, a creature takes 6d8 thunder damage and must make a Constitution saving throw. On a success their movement speed through the wall is halved. On a failure, they are thrust away from the wall ten feet in the direction they came from and they are deafened until the beginning of your next turn.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 4th.