Board Thread:Questions and Answers/@comment-68.147.188.196-20130420205357/@comment-1036637-20130423221634

As scary as it sounds to sell it off, I would. I had the same issue with my first Mythic egg. I waited several days, and what do you know, the next egg I got was another Mythic. Cosmic is only rare so it shouldn't be too hard to get again. The game won't take the egg from you but you'd lose so much valuable time if you just let it sit versus selling it and trying again later. (: