I mean.. Orochimaru could literally make two of himself, let one slip out, then pretend as if nothing's happened. The guy hunted for justu, so it's a given he has powerful genjustu alongside sharingans. Obito himself had controlled Yagura, a perfect jin(!!), with just his sharingan. What gives? Who gave Yamato the order to isolate himself for nothing more than a lonely death?