Board Thread:Breeding Questions/@comment-9946604-20130611233825/@comment-166.137.156.19-20130612152711

The easiest way to get a pure dragon is to breed two Lvl 4 legendary dragons. This is because of ratings. The total gold per minute from both legendaries will be enough to unlock all difficulty two breeding spots, which is the difficulty of all pure dragons. Increasing the legendaries' levels increases their total ratings, which opens up more difficulty three slots, causing the chances of getting a pure to actually decrease with higher levels.