Old Man Mo's origins were extremely mysterious as no one of the Eight Extremities World knew of his true background even after so many years having passed.
However, not only was he the oldest and most qualified Martial Saint of the Eight Extremities World, his martial arts were also one of the most supreme legacies in the Eight Extremities World.
His martial arts lineage was not inferior to those of the six great Sacred Grounds in the least.
Also, what caught the attention of many Eight Extremities World martial practitioners was that Old Man Mo seldom appeared in the outside world and entered battle. Thus, no one knew whether all that he had demonstrated thus far encompassed all of his capabilities.
While Yan Zhaoge could more or less identify the various martial arts that Old Man Mo was proficient in, seldom coming into contact with them, he could not easily distinguish his foundations.