Blade Barrier

You manipulate two metal weapons and create a vertical wall of whirling, razor-sharp blades. The wall appears within range of the spell and remains active for the duration of the spell. You can make a straight wall up to 100 feet long, 20 feet high, and 5 feet thick, or a ringed wall up to 60 feet in diameter, 20 feet high, and 5 feet thick. The wall provides three-quarters cover to creatures behind it, and its space counts as difficult terrain.

When a creature enters the wall’s area for the first time on a turn or starts its turn there, it must make a Dexterity saving throw. On a failure, the creature takes 6d10 lacerating damage. On a success, the creature takes half the damage.

At Higher Levels. When you cast this spell by spending Mana points equal to a 7th-level spell or higher, the damage increases by 1d10 for each spell level above 6th.