Talk:Reindeer Dragon/@comment-4712238-20111227231143/@comment-4610180-20111229010242

No, you're right. It's because Poison is Fire/Plant, both of which are opposites to Cold. Same for Flower. If you try to breed them with Cold, the game will tell you "Sorry. This dragon is incompatible." If you look at the Flower and Poison pages here, it even states that while hybrids don't have opposites, those two are an exception due to their typing.