Board Thread:News and Announcements/@comment-26581304-20151030184800/@comment-11654911-20151113131138

Also it looks like there's a pattern for unlocking island levels. Cold Land is unlocked at level 9 which is unlocked at 9 levels later, Air Island is unlocked at level 19 which is unlocked 10 levels later. Water Land is unlocked at level 30 because it should be unlocked 11 levels later according to the pattern. So Earth Land is unlocked at level 42 which is 12 levels later? Just a thought.