After all, the origin of the black thread is unknown, and Lu Xuan doesn't know how it corrodes the spirit glowing grass. It's okay if it works after pulling it out, but what if other spirit glowing grasses are still unavoidable from being eroded That would be heartbreaking.,The bluish-gray stone wall was encircled by a ring of black thorns, densely covered with sharp black spines, serving as a certain degree of protection.,Of course, it's also largely due to Lu Xuan himself. Since he crossed over, he has basically been in seclusion, with little communication with the outside world. Therefore, there haven't been many cultivators or monsters entering his courtyard.。