Lin Yun pondered silently in his heart. As a sword slave, his cultivation time and resources were both hindered. For three full years, he had been unable to break through to the third level of martial arts. This original owner's comprehension was still a bit mediocre.,In a low voice, Lin Yun pushed open the small wooden house and came to an empty space in front of it.,“This is inner strength! The cracking and resonating of bones generate inner strength, this is the sign of breaking through the second level, I have reached the third level of martial arts!”。