Wall of Death

You create a wall of black necrotic energy. 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 constitution saving throw. On a failed save, a creature takes 5d8 necrotic damage, or half as much damage on a successful save.