Board Thread:Game News/@comment-11292674-20130731183109/@comment-5354013-20130925043332

Once you get to a certain level (not sure where that line is)  you start to get the Super mystery eggs that contain 10k, 600 and better dragons that Pivato mentioned. I don't think I got Super Mystery Eggs until I was around L-26 or so. It doesn't cost anything to send them.