Wall of Gloom

You create a wall of shadow on a solid surface within range. You can make the wall up to 60 feet long, 20 feet high, and 5 feet 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.  It can be walked through, though the area inside the wall is heavily obscured.  The wall is magical darkness, so creatures with an ability that lets them see through magical darkness (such as Devil's Sight or Truesight) can see throught this wall.  

When the wall appears, each creature within its area must make a Wisdom saving throw. On a failed save, a creature takes 4d10 psychic damage, or half as much damage on a successful save.

Each creature that ends its turn within 15 feet of the wall must make a Wisdom saving throw, taking 2d10 psychic damage on a failed save, or half as much damage on a successful one. A creature takes the same damage when it enters the wall for the first time on a turn or ends its turn there.  Bright light within that distance from the wall is reduced to dim light, and dim light is reduced to darkness.  

Radiant damage that passes throught the wall is halved.  

The wall is difficult terrain.  

A creature that fails the saving throw against psychic damage while directly inside the wall is blinded and deafened until the end of its next turn, and has disadvantage on saving throws while blinded and deafened in this way.  

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage from being directly inside the wall increases by 2d10 for each slot level above 5th.