For some reason, the Black Hole suddenly attacked all major groups, as if they had planned it a long time ago. Black Hole took the four most influential groups in Handway City. Whereas they only had one branch group called Dragger before.
Perhaps Black Hole was dissatisfied with just having Draggers and their own business. The leader had such big ambitions that he wanted to lead the four groups that had the most promising businesses in Handway City.
Finally, the Black Hole attacked the four groups; Hell Gate, Creeper, RJC, and Beast Empire. The four groups lost at the hands of the extraordinarily strong core team of Black Hole. Therefore, they had to bow down to the monster and were forcefully dragged into The Deadly Square.
Like leeches, Black Hole forced the five groups within its area to make mandatory payments regularly. Black Hole's source of income was the five groups they had defeated.