Unique in the World

"Ouch!" Lin Yun suddenly clutched his head, his face contorted in pain.,The ten levels of martial arts, the first three cultivate skin, bones, and meridians. The middle three cultivate flesh, blood, and five internal organs. The last three connect tendons, transform bone, and change marrow, reaching the peak of the tenth level.,In a dim corner of the wooden hut, there was a sword lying in a basin of icy water.。