Gloomwrought Barrier

3rd-level conjuration (hieroglyph)

Casting Time: 1 action
Range: 100 feet
Components: V, S, M (a piece of obsidian)
Duration: Concentration, up to 1 minute

When you cast this spell, you erect a barrier of energy from the realm of death and shadow. This creates a wall 20 feet high and 60 feet long, or a ring 20 feet high and 20 feet in diameter. The wall lightly obscures vision through it from one side of your choice but is transparent from the other side. A creature that tries to move through the wall must make a successful Wisdom saving throw or become frightened of the wall until the start of the creature's next turn, when it can try again to move through. Once a creature makes a successful saving throw against the wall, it's immune to being frightened of this gloomwrought barrier.