For an ordinary person to break through to the Bone Marrow Cleansing Grandmaster Realm, they must first raise their Martial Arts Cultivation to the peak of internal organ Tempering, completing the refinement of all their Five Viscera and Six Viscera. Only then do they have a chance of breaking through.
This is because the Bone Marrow Cleansing process places immense pressure on the body. If one's body has not been sufficiently tempered, forcing a breakthrough means the sheer force of the Cleansing will be too much to bear.
Once the body reaches its limit, it will explode from the inside with a BANG, reducing the person to a bloody mist. The process is incredibly gruesome—it's tantamount to suicide.
Therefore, anyone who understands the process of becoming a Bone Marrow Cleansing Grandmaster will always complete their body's Tempering first. It is the most fundamental prerequisite.
