Destructo Disc

After raising your hand in the air, a spinning disc made of pure energy takes shape. Once formed, you throw the disc in a straight line for 120 feet before it dissipates. Each creature in the line must make a Dexterity saving throw. A creature takes 6d6 slashing damage on a failed save and no damage on a successful one. If the creature rolls a natural 1 on the save, they lose a limb as determined by the DM.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.