When Wu Song meets Wang Feitian, he pretends that he is planning to go down the mountain to wipe out the “enemy”, the “Tattooed Monk”, Lu Zhishen. Simulating a fight with Lu Zhishen, they strike from within and without, kill Wang Feitian and seize the Twin Dragon Peak. At this moment, Lu Zhishen and seven other men hoist a huge banner at the place; they recruit men and buy horses, store up hay and grain, and so they gather under the cardinal principle of Righteousness.
武松見了王飛天，以下山消滅“敵人”花和尚魯智深爲名，與魯智深假戰，裏應外合將王飛天殺死，取得了二龍山。從此，魯智深等七人在此豎起大旗，招兵買馬，積草屯糧，共聚大義。