Bladefall

Conjure a wall of shadowy blades from Mabar, the realm of Endless Night.

Each target in a 10 foot wide, 50 foot long line must make a Dexterity saving throw. A target takes 5d8 necrotic damage on a failed saving throw, or half as much damage on a successful one. The swords last for up to a minute, during which time they are considered difficult terrain. If a creature moves through the area or ends their turn in it, they must make a Constitution saving throw. A target takes 3d6 necrotic damage on a failed saving throw, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the initial damage increases by 1d8 damage and the grounded blade damage increases by 1d6 damage for each slot level above 4th.