Chen Mu's mind flashed with the process of Blood Exchange.
Actually, during the process of Martial Body Refining, not only the physique underwent the infusion of heaven and earth, but the Soul Heart was also detached from the body, enduring the tempering of heaven and earth, and would experience a leap in Realm. This is why, once Qin Mengjun completed the Blood Exchange transformation, his Qian Heaven Domain immediately expanded to a full hundred feet, far surpassing the Marrow Cleansing Realm.
This was also a crucial Life and Death Pass, as if the Martial Arts will was not firm enough and the Soul Heart not strong enough, even if the physique could withstand the washing, the Soul Heart would collapse, dissolve into heaven and earth, and perish, hence this step was called the Life and Death Pass! Historically, countless Grandmasters died attempting this step of Blood Exchange, which is why it was taken only when there was absolute certainty.
