An obscuring wall of complete darkness appears at a point you choose within range. The wall appears in any orientation you choose: horizontally, vertically, or diagonally. It can be free floating, or it can rest on a solid surface. The wall can be up to 60 feet long, 10 feet high, and 5 feet thick. The wall blocks all types of vision except truesight, but creatures and objects can pass through it.

When the wall appears, each creature in its area must make a Constitution saving throw. On a failed save, a creature takes 3d12 radiant damage, and it is deafened for 1 minute. On a successful save, it takes half as much damage and isn’t deafened. A deafened creature can make a Constitution saving throw at the end of each of its turns, ending the effect on itself on a success.

A creature that ends its turn in the wall’s area takes 3d12 necrotic damage. As a bonus action on later turns, you may move the wall any direction up to 30 feet. Each creature that the wall passes through must make the saving throw against this spell. The wall's orientation remains the same when you move it. 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d12 for each slot level above 5th.