Aside from himself and the two assassins that escaped earlier, William killed his entire group. In fact, Su Mian was likely only alive because he was the leader and carried valuable information.
Su Mian had been in William's position several times before, and he knew exactly what the boy was thinking. Rather than ruthlessly killing everyone, why not take advantage of the situation to learn more about the Riverveil Family?
"So, tell me about your group." William walked forwards calmly. The kunai flipped and twirled in his hand as if he'd been handling kunai his entire life.
"As if I'm going to tell you anything!" Su Mian backed away from the approaching William while he thought of a way to counter the flashbang Artifact.
William tilted his head slightly, "You must know a lot, then, if you're willing to trade your life for it! Flashbang!"
