Zhang Yu silently looked towards Le Mulan's Deep Cold Magical Vein.
Although the last time the Deep Cold Magical Vein advanced to Level 4, Le Mulan was not by Zhang Yu's side.
Yet through the study of the Dao Seed Chart and some of his own experiments, Zhang Yu had already understood the effects of a Level 4 Deep Cold Magical Vein.
"The Level 4 Deep Cold Magical Vein can cause the entire body, or part of the body, to enter a state similar to hibernation at any time."
"In this state, the consumption of lifespan can be reduced by a hundredfold."
Zhang Yu thought to himself, "If I fully utilize the Deep Cold Magical Vein to maintain my body and use only my will and Primordial Spirit to work, then my lifespan would effectively be extended a hundredfold."
But to Zhang Yu, this was not the aspect of the Level 4 Deep Cold Magical Vein that worried him the most.
He reached out his fingertip, and a faint chill began to emanate from his index finger.
