The Dark Night Sect had difficulty dealing with the Four Great Hall Masters, having attempted several actions but all ending in failure!
Moreover, Xia Yuyi is the most prized disciple of the Golden Leaf Sect Leader. Lin Mu saved Xia Yuyi, and just from this perspective, they are filled with gratitude towards Lin Mu!
"Hello, I've heard Yuyi talk about you before, thank you for taking care of Yuyi during this time!" said the Golden Leaf Sect Leader.
"Golden Leaf Sect Leader, you are too kind. These are trivial matters. If possible, I wish to help you!" replied Lin Mu.
Given the current crisis, the Dark Night Sect indeed needs help. It's just that before, for the sake of sect's pride, even though Xia Yuyi repeatedly proposed getting Lin Mu's help, they always refused!
But now there's no way around it. If they rely only on the Dark Night Sect's strength against the Heaven and Earth Society, then the Dark Night Sect will soon be utterly doomed!
