Wall of Blades

You summon a wall of Spectral Blades within range. You can make the wall up to 30 feet long. 

When the wall appears, each enemy within 10ft of the Blades must make a Dexterity saving throw. On a failed save, a creature takes 2d8 necrotic damage, or half as much damage on a successful save.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.