A shimmering wall of bright light appears at a point you choose within range. The wall appears in any orientation you choose: horizontally, vertically, or diagonally. It can be free floating, or it can rest on a solid surface. The wall can be up to 60 feet long, 10 feet high, and 5 feet thick. The wall blocks line of sight, but creatures and objects can pass through it. It emits bright light out to 120 feet and dim light for an additional 120 feet.
When the wall appears, each creature in its area must make a Constitution saving throw. On a failed save, a creature takes 4d8 radiant damage, and it is blinded for 1 minute. On a successful save, it takes half as much damage and isn’t blinded. 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.
A creature that ends its turn in the wall’s area takes 4d8 radiant damage.
Until the spell ends, you can use an action to launch a beam of radiance from the wall at one creature you can see within 60 feet of it. Make a ranged spell attack. On a hit, the target takes 4d8 radiant damage. Whether you hit or miss, reduce the length of the wall by 10 feet. If the wall’s length drops to 0 feet, the spell ends.