Visir's Wall of Stupefy

You create a wall of magic on a solid surface within range. You can make the wall up to 60 feet long, 20 feet high, and 1 foot thick, or a ringed wall up to 20 feet in diameter, 20 feet high, and 1 foot thick. The wall is opaque and lasts for the duration.

When the wall appears, each creature within its area must make a Wisdom saving throw. On a failed save, a creature is stunned until the end of its turn.

A creature must make a Wisdom saving throw when it enters the wall for the first time on a turn or ends its turn there.