It shows that the overshadow dragon is on the current event but I don't see him on the new island, is this only me?

I have 2 questions about the habitats:

1. What is the maximum level of a habitat?
2. How much does it cost to reach it(and if the price is very high, is it possible to reach it?)?

@robert-eduard I don't think that the dragonarium is useless
For example I can take the heroic race- if you don't have any clear habitat to hatch eggs, you can put them inside the dragonarium and it will still give you the item
Then you can just build a habitat and clear the dragonarium when the habitat is ready
Full hatchery is also problem that the dragonarium solve, instead of waiting for a habitat to be ready, you can put the dragons inside the dragonarium and get more eggs on the hatchery(also it could help you clearing the breeding buildings)
If you need a specific dragon from the dragonarium you can switch dragons

But apart from that, I think they should add something that let's you switch dragons easier
Anddd ok I think the dragonarium is some sort of prison(but not really a prison if you use it in the right way)

I agree about the lap 50 and the amount of tokens needed in order to upgrade a habitat

I got the reward from it but I don't know where do I redeem the code, if anyone knows please help

Today I went through a weird bug on the Dragon Rescue event:

As shown in the picture(check the link above this), my archangel dragon got defeated but for some reason he didn't disappeared(You can see the red X on him)

Other stuff that the picture doesn't show:
-The idle animation of the dragon was still going, even though he's not really there
-The enemies didn't attack him (and he didn't attack them)

(The bug didn't affect my gameplay, there was nothing abnormal after the battle)
Did anyone else witness this bug?

Edit: per forum rules, live link removed. Please upload pics using either the chain link or cloud icons anove.

@nynaevelan thank you

I've managed to get the 2 dragons I need to complete the quest, but after they got hatched, I didn't got any reward, when the event ended I still didn't got the reward