User blog comment:CesarTheSanchez/My Singing Monsters is set to release a new monster and may be a special island./@comment-7326455-20130716025013/@comment-12240517-20130716185630

There are different types of Ethereals ( Plasma and Mechanic) so a Summer Ethereal would make sense( especially because of the previous offer). Earth hasn't had a limited addition monster so that would sense too. Either way I will have to be lucky with breeding in order to get it.