I can't agree to brain9h, they are not fine, well maybe if you don't play aether and don't have to use them. 13 is too expensive for these dragons.
I play mono-aether mostly, and 13 is fine, honestly. Aether is not about spamming weak creatures.
Whats your point here? I play mono aether, I know what’s right? 13 is not ok just because you say so.
As mentioned I have played some other elements as well, which should give me a better view on balance, not a complete one of course. I think 13 is to expensive. Aether is still a good element, but not because of the expensive dragons. You can defend yourself quite good with your shields, your special weapon and your Lightning is able to destroy the stronger enemy creatures. On the other hand, your creatures won't be defeated, I used dragons/parallel universe before the change, I just defended myself until I had enough energy and cards for a killing blow. Now I have to play my undefeatable creatures, watching them dealing damage slowly while I try to defend myself. My creatures can't be attacked, but they are not strong regarding the damage.
Aether is a strong element, it can win against many decks, but it also has many opponents which will defeat you. Steal and Deflagration can end your defence pretty fast if your shield is the target, Gravity can make your shield worthless with momentum, Earth can earthquake your pillars, with the high cost aether cards have, this will slow you down to a point you can't win.
I know my element, and I still think 13 is to expensive, it should be back to 11, the dragon didn't get stronger, it lost attack powers, I can't use parallel universe on it any more, which is quite a disadvantage. Of course it is still a powerful card, but I just don't think it's stronger than before, so I don’t think it should cost more than before.