There is also a chance that a kingdom can have a migration power cap (again, to deal with the issue of OP players migrating and taking over everything). Rise of Kingdoms city hall upgrade requirements.So, it's only allowed to migrate to developed kingdoms - these are kingdoms/servers that have been open for more than 120 days. There's also a pre-determined rule that will not allow super-advanced players to migrate to underdeveloped kingdoms because that will result in a great unbalance of power. In RoK, migration cannot be done by just anyone, and it's going to require quite a few resources. This process is facilitated by the use of a Rise of Kingdoms Passport page and if you're eager to learn how you can do it yourself, then keep on reading! That's also called RoK migration, and it's the process that allows players to switch servers (in very simple terms). Sometimes, servers will not get a high number of players, and will leave players residing there with very few allies or enemies - that's when passports come into play. In Rise of Kingdoms, there are several servers available to players, with new ones coming out every now and again.
