Talk:Overlord Volume 10/@comment-28662320-20160623164647/@comment-28768171-20160624205658

That castle is their guild hall. Ainz asked if Sebas had seen any flying castles in voulme 1 and based off what we know about the NW they don't have magic powerful enough to make a flying castle. Having a world class item does help make you one of the top tier guilds, but it is like you said all of the members probably weren't still logged on, so only the guild hall and the few inside it were transported.