Dragon City is an online game run by servers, and each server and program checks it regularly. So, there is no unfair play or cheating in the game. The game developers make sure that there is no foul play in the game, and they constantly take action against people who cheat in the game. But this Dragon City Mod is built in such a way that it bypasses all the security checks and makes it look like normal gameplay, so it looks like a fair game.