Wang Zai'an paused when he heard Lin Qianru's words. His expression became unpredictable.
Lin Qianru was right. Wang Anlong sent him to Modu not just to capture Lin Qianru to threaten Lu Tianxing, but more importantly to make Lu Tianxing apprehensive and not dare to do anything against the Wang Family. If Lin Qianru died, then bringing a corpse back would be useless and might even anger Lu Tianxing, causing him to fight the Wang Family to the bitter end.
However, he also wanted to kill Tie Niu. Tie Niu's strength was infinitely close to the Mythical Realm. He defeated Tie Niu purely by realm suppression, yet he still sustained minor injuries. If Tie Niu entered the Mythical Realm, it would be equivalent to establishing a formidable enemy.
If you do not remove the root, the grass will grow again. However, he could feel that Lin Qianru wasn't lying. If he dared to kill Tie Niu and Lin Qianru committed suicide, then his mission to Modu would end in failure.