User blog comment:Metadwarfosis/In anticipation of volume 11- Dwarven Kingdom and Expectations/@comment-28417874-20160621230822/@comment-5480911-20160621233905

Well the CDL has been forshadowed to make it's appereance for some time now...the BS were orignally in the Re-Estize Kingdom as the thousand leage atrologer predicted its revival...that was why they were with their WI of theirs in order to brain wash it.

also more info about its revival has been forshadowed in the intermission of volume 10.

also it had a few brief mentioned here and there..particuler it was said that a dragon once lived near E-Rantel between it and the Azerilia mountains. Also when taking account how story goes...dragons and dwarves are usually always involved.

so if u add all the little bits of info and detail that have been spread out...you can pretty much can come out with what sort of scenario's will happen in the long run..why do you think nobody was suprised when it was revealed that renner was co-operating with nazarick..even the author was suprised that everyone already figured it out a long time ago.

Besides it is about time that ainz had actually got to meet them as they are the strongest NW inhabitants and have wild magic something that should be interesting as to how it will effect yygdrasil magic,