Hello Magical beings of Ignus, Blue Isle Studios has announced they are making a few changes in their game, Citadel. A few of their inactive servers will be taken down in order to continue supporting the active community and to encourage new players to join the more populated servers. The majority of servers will be left untouched, the few that will be removed will be done on May 24. For any players who may be affected by these server removals, they will make your server data available to download so you are able to play single-player mode or host your own private server with the data.
You can check which servers are coming down below.