I got ahold of a full-fledged dragon from a quest and thought: "Awesome! Let's go burn stuff!" and I did. I burned stuff so hard, in fact, that the rest of the game became a total cakewalk. I rushed through the quest of mastery in roughly 5 turns, completely demolishing all resistance.
The thing is that all dragons get an attack that deals their attack damage at range. This, in itself, is not problematic, but it seems that the damage dealt is undefendable as well. This results in that the full-grown dragon blasts an an enemy for 96 (!!) damage twice every turn. Now, I maxed out the adventure research tree and the strongest monsters I've seem have some 50 hp. I even finished the final battle of the quest of mastery in one combat round.
Is this intended? If it isn't I would like to draw the attention of the dev team to this, in case they have not noticed it before.