Cleaving Disk

You conjure and hurl a spinning disk of magical energy toward your enemies. The disk travels in a 30ft. long and 10ft. wide line. Each creature in this line must make a DEX saving throw. A creature takes 6d10 slashing damage on a failed save, and half as much on a successful one. 

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d10 for each slot above 4th.