Talk:Game Updates/@comment-153.18.112.3-20120216230153/@comment-4775325-20120217044809

Since the description for the Rainbow dragon describes it as "rarest of all dragons" i'm pretty sure that Backflip made it so but with all 3 being hard to breed and all breeding (with multiple outcomes) in DragonVale involving random chance some people get lucky breeding Rainbow and/or unlucky with Sun/Moon and vice versa.

To breed Sun/Moon the requirement seems to be having Cold&Lightning elements. Popular combo's include Cold+Firefly and Fire+Storm.