The Ritual…!! (儀式…!!, Gishiki…!!) is chapter 345 of the original Naruto manga.
Sasuke stands over a dismembered Orochimaru. He believes he has won, but finds he cannot move. Orochimaru rises and says his blood evaporates on contact with air and numbs those nearby. He swallows Sasuke to initiate the body-swap. Sasuke finds himself within Orochimaru's subconscious where Orochimaru tries to gain dominance over him. Sasuke activates his Sharingan. Kabuto returns to Orochimaru's room and finds the body switching process has ended. As Sasuke leaves the room, he asks whose consciousness has control of the body.