C2154 Deal with the Killer

The secret of these assassins hiding in the shadows seemed very high-end, but if it was revealed, they would be worthless. It just so happened that Yu Kun could see through it.

When he was fighting with the Female Assassin in the study room, Yu Kun had already noticed this problem. That was the so-called Invisible Shadow Technique that these assassins were using. It was not truly invisibility