The entire process took place in the span of a split second. Even as Sasuke felt a burning sensation across his abdomen, Naruto had already sealed Black Zetsu inside his body.
When Sasuke lifted his shirt and looked down, he saw a pitch-black seal pattern right in the center of his abdomen, surrounding his navel.
The seal pattern consisted of two symmetrical, interlocking parts with sharp, distinct edges, looking precisely like two sturdy heavy locks that firmly trapped Black Zetsu deep within Sasuke's body.
Chapter 237