Vogon Bureaucratic Wall

You create a wall of opaque, glowing paperwork and official documents. The wall is 60 feet long, 20 feet high, and 1 foot thick. It is a mass of confusing forms, circular logic, and incomprehensible fine print. When a creature attempts to move through the wall for the first time on a turn, they must make an Intelligence saving throw. On a failure, their speed becomes 0 for that turn as they become utterly bewildered. On a success, their speed is halved as they push through. The wall is difficult to see through, and creatures behind it have half cover.