C115 Unlocking the Chains of Heaven and Earth

The spine was the hardest bone Lee Yue had to temper from the hand bone to the leg bone.

The berserk energy was unable to analyze what could and cannot be tempered, it could only be controlled by him, tempering it to every part of his bones. If the energy was too berserk, a little carelessness could hurt his nerves, after all, he couldn't break through his body weight.

Even then