Blade Barrier

Duration: 10 minutes, Concentration
You create a wall of blades. You can make a
straight wall up to 100 ft long, 20 ft high, and 5
ft thick, or a ringed wall up to 60 ft in diameter,
20 ft high, and 5 ft thick. The wall provides 3/4
cover to creatures behind it, and its space is
difficult terrain.When a creature enters the wall's
area or starts its turn there, the creature makes a
Dex save throw. On a failure, the creature takes
6d10 slashing damage. On a success, the creature
ta