Even if all the members of the two guilds, Huashan and Century Flower, were assembled, it was still impossible for them to conquer a city by normal means.
They could not do it, and the same goes to the other guilds unless someone could gather all the forces of all the major guilds on the mainland. Only by fighting upfront with millions of people would there be the possibility of succeeding.
Scumbag Wang's idea was far from that of the ordinary people. What others could think of, he could not; what others could not think of, he could.
When he was detained in the small black room, a few of his loyal men had tried to break into jail to free them. The end result was evident. A jailer got rid of them all.
Later, another of his underling went to break into jail, but the result was unexpected. The jailer did not fight back but stood there motionless and was killed by Scumbag Wang's underling.