Quote Originally Posted by Assertn View Post
Usage? What did he even do when it crumbled out? He just stood there while Obito used the resurrection jutsu.
Of the gedou rinne tensei. Black zetsu took over his body and madara completed the technique thus crumbling his eyes in the first stages of his resurrection. Because obito's eye is fine while both of madara's are out. It looks like the wear went to madara's eyes while obito utilized the technique