Board Thread:Questions and Answers/@comment-24351824-20140123041633/@comment-7326455-20140123055801

They play a whole new song. You can breed two-element ethereals. Um... pretty, pretty shards?

One option is to leave the current Etherals where they are until you manage to get another one cooking - when the new ones are ready, teleport the old ones and replace them with the new ones right away.