Board Thread:News and Announcements/@comment-24351824-20140208191615/@comment-24145588-20140310003854

If they develop the whole Ethereal family, and just keep the one island, there would be a problem with bed space:


 * 5 one-elements = 25 beds
 * 10 two-elements = 100 beds
 * 10 three-elements = 150 beds
 * 5 four-elements = 100 beds

To just get one of each would require 375 beds in the castle on that island, and that's not allowing any room for individual design choices.

They'll have to either leave some out of the set, allow a much bigger castle, or split up the Ethereals into multiple islands.