Wu Yu naturally knew clearly. 

There had probably been a lot of conflicts between Prince Le and the Perennial Shark. The Perennial Shark was also one of the few within the tomb that wasn't fearful and respectful towards Prince Le. 

If it was outside the tomb, there was no way Prince Le could have killed him. With the Taigu Immortal Talisman, the other party could leave the Taigu Immortal Path easily. 

The greater issue was that if the Perennial Shark got out and returned to the Jambu Realm, he would spread the news of Prince Le wanting to kill him. This would likely trigger a conflict between the two huge forces. 

The Perennial Shark definitely had an elite force behind his back. 

However, this was similar to Wu Yu killing Xiao Yili and seizing back the Water Source Ancient Crystal in this place. 

Prince Le also possessed the audacity to kill the Perennial Shark in this place. This was because no one could use their Violet Kingdom Primordial Energy and therefore couldn't utilize any of their talismans. If one died here and no one else knew, nothing would be leaked. 

Other than the five people around, no one else would know. 

Therefore, Prince Le probably felt that this was a once-in-a-lifetime opportunity! Moreover, he wouldn't have to commit the act himself. 

He wanted Wu Yu to do it! 

Whatever...