Pangaea666: That Adra Dragon, eh, is it utterly impossible? Don't think I've ever seen such a spike in difficulty in any game before.
We're all level 11, I have Eder and Paladin-girl in the party, but about 3 seconds into the fight, before I know there are heaps of other enemies too, half the party is dead (actually 4 of 7 with Itumaak), two others an inch from their life, and Sagani only survived unscathed because she happened to be stood further back. This is on normal difficulty.
Yes, dragons are legendary creatures and supposed to be hard, but this untouchable? Almost literally? Either our attacks missed entirely, despite good rolls, or they barely registered as an annoyance for the dragon.
My only choice is to retreat with the tail between our legs and hope another level will somehow help (don't have the expansions), which I seriously doubt. If we were somewhat close I could have tried again and again and again until we got lucky, but this is pointless.
You need high accuracy and spread your party, because yes, his breath attack is nasty if it is able to catch your party (that is killing you).
There are many different tactics to beat him (and superb weapons and armors)
In my case, the first time I used a tank with deflection of 125, plus potions, to distract him meanwhile the party kill the other creatures.
The dragon, is not impossible (wait for the last special encounter of the second part of the expansion for that title :P ) but frankly requires a lot of focus from you part.
P.d. and is not mandatory to kill the dragon, you can ally with her