Hearing Zhao Fu's words, the City Lords' expressions became grim. Since they had signed a High-Grade Contract with Zhao Fu, if they broke the contract, they wouldn't be able to use their City Lord Seals anymore. Without their City Lord Seals, how could their 100,000 Stage 1 soldiers fight against these countless Skeletons?
The punishment of the High-Grade Contracts was quite severe, but it was even worse for Zhao Fu: he had promised that he wouldn't attack their main cities, and if he broke the contract, he would immediately die. Moreover, the contracts lasted for half a year.
The City Lords were only willing to sign because of that. If they broke the contract, the Undead army would turn back, and their main cities would be completely annihilated without being able to resist at all. Their people would all be slaughtered.