With bones like these, cultivating the Flawless Venerable Jade Bone is incredibly difficult; it's a feat only one in ten thousand could achieve.
For an ordinary Martial Artist, cultivating Iron Bone—making the bones as hard as metal—is considered reaching Bone Forging Realm Perfection.
In truth, for such a Martial Artist, the degree to which their bones are strengthened is far from sufficient. Many can't even fully cultivate all their bones.
For example, during the Cultivation of a Bone Forging Technique, it is very easy to injure vital areas like the brain and spinal cord when working on the skull and spine.
Furthermore, these areas are difficult to stretch and exercise, so almost all Bone Forging Techniques provide very limited training for the skull and spine.
As a result, the bones in the skull and spine remain far from adequately strengthened.
