Talk:Game Updates/@comment-25758325-20190421133737/@comment-33104098-20190423063010

The "'only' be bred through co-op" thing is when someone doesn't have a particular dragon that is currently not breedable by its own breeding combo, and wants to get it. (Evolved dragons don't have breeding combos, so like Smiley said, are excluded from this.)

A side note - your post made me realize one thing I missed before: In the dragonarium, for a dragon that is currently not breedable (even if it is obtainable, like current event dragons that are not breedable but you can buy), if you do not have any at all, then the hourglass is not displayed even if it is a limited dragon.

So, at first I thought the 5 not-breedable event dragons not having the hourglass in the dragonarium is inconsistent with the dragon info when brought up from the prizes, but it was only because I did not have any of them yet at that time. Those 5 are limited after all.