You point at an object weighing between 1 to 5 pounds within range that isn't being worn or carried, and launch it at a target.
For each spirit upcasted, you increase the weight of the object by 5 pounds.
A chosen object, light as a feather, becomes a magical projectile. With each additional spirit invoked, its weight multiplies, transforming a mundane item into a formidable force hurtling toward your chosen target.