Thread:Sylvandyr/@comment-8247142-20130416053205/@comment-4830404-20140125005930

Looks like they may be doing one of two things...

1) Making Nightmare breedable.  Clockwork was made that way, so it's possible.

or

2) Phasing out unbreedable rarity slowly.  I think that the unbreedable rarity in the data is just a note for them, because they do the expiring dragons and such server side (without need of the data).  This is shown with stuff like Forestfire, and they used to put "unbreedable" notes on some limited breedable dragons, but since those dragons were re-released and re-expired, the notes were never changed back to "unbreedable" (because it wasn't necessary).

Not sure which one but I'm sure we'll hear soon...