Board Thread:Questions and Answers/@comment-25864739-20161216191718/@comment-1738746-20161217031749

Very Common and Common are also in the same "Common" category :) We try to keep the categories for rarities as simple as possible in order to maintain their flexibility, as rarity is not an official thing in the game. We only have it here on the wiki because it's been popularly requested and we all try work on it together to give others the best idea we can with regards to how common or rare a dragon might be. A dragon's rarity can change as well, particularly just after a new dragon is released, so there is that to consider as well.