Aethaldin's Portable Railgun

You imbue an object with arcane force. As you chant the incarnation, the object begins hovering and spinning until it is too turbulent to contain. You throw the object at great speed, causing a loud boom that can be heard from 200ft away. Any creatures in a 60ft line must make a Dexterity saving throw. On a failed save, the target(s) take 6d8 force damage and are flung 30ft backwards and fall prone. On a successful save, the target(s) take half damage.