Wall of Darkness

You create a wall of magical darkness filled with horrors from the nine circles of hell. You can make the wall up to 60 feet long, 10 feet high, and 5 feet thick, or a ringed wall up to 20 feet in diameter, 10 feet high, and 5 feet thick. The wall blocks line of sight and physical objects cannot pass through the wall. Bright light turns to dim light out to 60 feet.

When the wall appears, each creature within its area must make a Dexterity saving throw. On a failed save, a creature takes 3d8 fire damage and is restrained. On a successful save the creature takes half as much damage and is not restrained.

When a creature attempts to pass through the wall for the first time on a turn it is restrained and takes 3d8 fire damage. A creature can use its action to make a Strength check against your spell save DC. On a success it frees itself. If the creature ends its turn inside the wall, it takes 3d8 fire damage.