As expected, there were faint black lines running across the back of the leaf. If it weren't for Lu Xuan's careful attention, these hair-thin black lines would be extremely difficult to spot.,"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.","Finally, I'd managed to save up some spirit stones... I was planning on paying the spirit field rent in two months."。