Board Thread:News and Announcements/@comment-24351824-20140208191615/@comment-24577221-20140309043026

Four more two-element Ethereal monsters are possible, if we get no more one-element Ethereals. Then we could get ten three-element, five four-element Ethereals, and perhaps even a five-element Ethereal. So there's still a bit of room... without even getting into possibilities such as extra-rare single-element Ethereals that appear on the five regular-element islands only 10% of the time instead of the current single-element Ethereals.

Or a new Legendary monster that appears on, say, Cold Island, like the Shugabush does on Plant Island. And it could begin a whole new family on another island.

Or... well, there are lots of possibilities.