It took a great deal of energy and focus to finally clean it up, but the next day when I went back to check, the black threads appeared again, and there were even more of them than before.,"According to this trend, in one or two days, this plant of spirit firefly will be occupied by the black thread, and it is very likely to spread to nearby spirit firefly plants.",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.。