Board Thread:Versus Debates/@comment-2245550-20160522071949/@comment-25122992-20160522181301

Actually, Sharingan copying ability doesn't make 5 natures mastering easier. To copy a natured technique, you must already possess the nature of it, otherwise you won't be able to do this. So Kakashi mastering 5 natures is the same feat as the one of Hiruzen.