My theory on making them non tradeable is that most of these dragons they have as ultra rare. Now if we get doubles on some n wanted to trade, well that's 100 essence. S8 cant allow us to accumulate essence that easily!!

This month they limited Orbit and Universe to 1 only and that too seems to fit my theory...can't be too safe, limit those dragons and make them untradeable too! S8 just can't be generous. Very very sad.

My 2nd theory is they were defined as untradeable by mistake and we all know when S8 makes a mistake, it's rarely admitted and rather we're told, it's intended!!!

Maybe S8 will actually read this and think...wow, we change them all to rare n let them be traded for little bitty 10 essence!