Board Thread:General Discussion/@comment-9051002-20170820023748/@comment-83.251.90.104-20190824104247

I think it's becuase he doesn't change the actual object, he just puts a fake image over it. So the object and the image he conjured are two seperate things. It's similar to fixing two playing cards cleanly on top of each other so they appear like a single card. And unless you held them most likely you wouldn't notice there were more than one card.