Black Law Protector

He was the person who gave Murong Family the recipe for Cold Food Pill.

Appearance
The male wore clothes made out of ashy, coarse cloth. His body was covered by a black cloak, which had a high collar that covered his face. The only thing exposed were a pair of falcon-like eyes that peered at them from the darkness.

It seems like this is the black law protector Murong Feng was mentioning.

Plotline

 * He was about to kill Wu Xin and capture He Xi, but was interrupted by Old Beggar Man who appeared out of nowhere, saved He Xi and his companions and sent him flying, who knows where, in a single move.