I know there are base dragons, hybrid dragons and rare dragons (which are also generally a type of hybrid dragon).
From what I have read rare dragons are supposed to be, well, more rare. How does this compare to other dragon breeds though? So far I have gotten one Flower, Two Tree and (I think) two Moss dragons. Not a single Poison Dragon as of yet. It does not seem to be a rare dragon but then again I can not find anything marking any other dragon as a rare dragon.
Is breeding just a roll of the dice? You have a small chance to get a rare type otherwise its just equally random to get any other kind of dragon that is valid for the combination?
Best Answer
Rare dragons are certainly less likely to be bred when they're an option. It's all a matter of chance, though there's been some unproven theories that the dragon you put on the left side of the breeding menu determines the order of elements of the egg. It doesn't seem to hold true.
Generally assume the breed will yield a random possible combination, and note that rare dragons are very rare, I'd say maybe less than a 10% chance. I don't think there's any formal numbers. From experience only Rare dragons have a different breeding chance, everything else, assume an even chance of all other possible results. If there is a difference, it's not large enough to fuss over.
Special Event dragons also tend to be "Rare" at approximately the same rate as the Sun/Moon/Rainbow dragons. Generally you'll want to stop everything and start trying to breed time-limited dragons immediately until you get one, or two if you want a breeding pair.
Note the Epic Breeding Island advertises that you have a higher chance of rares. It doesn't seem extremely significant; rare dragons are still rare on the breeding island. In fact I haven't noticed a perceptible difference, but if you're trying to breed for rares you might as well try the island first.
Also note that breeding two dragons always gives you that same dragon (best I can tell), so breeding two Rare Rainbow dragons has a 100% chance of giving a rainbow dragon.