Wall of Ink

You conjure up a wall of colorful liquid 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 circular wall up to 20 feet in diameter, 20 feet high, and 1 foot thick. The wall blocks line of sight, but creatures and objects can pass through. It vanishes when the spell ends.

When moving through the wall, a creature must make a Constitution saving throw. On a failed save, it is blinded for 1 minute. A blinded creature can make a Constitution saving throw at the end of each of its turns, ending the effect on itself on a success.