Board Thread:Dragon City Questions and Answers/@comment-198.84.190.207-20130425213429/@comment-219.89.73.157-20130530204701

If you breed, say, a fluorescent and a firebird, the fluorescent has BOTH of the opposing elements of the firebird, so you probably have a higher chance of getting a rare hybrid. The dandelion + laser combo (how I got my gummy) could also produce a soccer or a cool-fire. Also try neon + nenufar/coral, star + jade/dragonfly, whatever has the two opposing elements of the other.

Hope this helps :)