Clone the object with magnetic lasso, move it into position, give it a shadow, then delete the cloned object. Fiddle slightly with position. Don't really care that much, just saying.
besides look real close the rest of the image is crisp and fresh the blade is dull and slightly pixelated
also look haw this hilt-less blade is casting a shadow on the Queen's hand.
its a photoshop! and a reasonably good one at that! just cause you can't do it doesn't mean it can't be done! enjoy the humour of it, don't nit-pick, its REALLY LAME!!