Ants

When the four elders heard that voice they started to look around but saw no one, nor could they feel the presence of the interloper. Yet despite not seeing him he was still able to stop the Golden Core Elder's palm strike. This would mean that the other party was at least at the Golden Core Realm. Even Fang Mu was confused as he remained motionless, his body too hurt to be able to fight.

"Who is there? Do you know who you're messing with here? We are from the Sun Clan and the Meng Clan! If you know what's right for you then you better leave now while we're being merciful."

The elders of the Sun and Meng Clan waited for a response, and when they heard no response they thought that the interloper was intimidated by them and left. So the Golden Core elder was about to continue his attack on Fang Mu, but as he was about to release another palm strike someone suddenly appeared beside him. 

"I told you that's enough."