Rainbow type

Why was rainbow type added, then taken away? There are still plenty of rainbow types that are permanent dragons. You guys did that with champion as well. There are 4 permanent champs too. I really don't understand the whole thing with these types. A type is a type is it not? This game is a mess and useful already added types get removed

You got resource dragons with their own type tab with 1 dragon for crying out loud and yet types with 25, 40 and even 80 are scattered throughout the ALL tab. Come on now. Very unorganized. All you need to do is unhide the type tab. It's obvious they are already there