Wall of Ink

You create a wall of ink on the ground at a point you can see within range. You can make the wall up to 30 feet long, 10 feet high, and 1 foot thick, or you can make a ringed wall up to 20 feet in diameter, 20 feet high, and 1 foot thick. The wall vanishes when the spell ends. The wall’s space is difficult terrain and obscures vision. (Cannot see the other side through it)

Refer to Wall of Water for additional information.