It took three months for Kai Syaoran to reach the peak of Bone Forging.
After this, he continued his cultivation and broke through to the second stage of the Mortal realm, the Blood purification stage. In this stage, one was supposed to remove all impurities out of their blood and Kai Syaoran had a lot of impurities in his blood as a result of purging his bones of all their impurities.
Kai Syaoran's bones were now as strong as steel, perhaps even stronger.
Kai Syaoran began using the world qi to purify his blood one drop at a time.
His blood had turned black due to impurities.
After the first two hours of cultivation, black ooze began flowing out of his orifices such as the eyes, ears, nose and mouth.
Cough, cough, Kai Syaoran suddenly began coughing out black blood that splattered all over the sack.
Kai Syaoran stopped his cultivation as he continued coughing out the black blood.
