Board Thread:Naruto Discussions/@comment-1018594-20160409062530/@comment-25122992-20160416191028

Emm, the first hole in his heart actually was a genjutsu, Obito used it to metaphorically show Kakashi the emptiness of his heart. The real wound on his chest was inflicted by Kakashi during the final clash of their battle, when they stabbed each other with Raikiri/Black Receiver respectivelly.