*Tap* *Tap*
Xin Feng poked Sato's back a few times, which shocked him, because he did not hear nor expect someone to be behind him. Sato was caught off guard, even though he was completely on guard. That's because, Xin Feng was simply covert enough. He knew how to hide in the darkness, plus the fact of Sato being a normal mortal wasn't much of a justice against Xin Feng's overwhelming experience and abilities.