Battle of the Celestial Gates

What difficulty level was the hero playing on?

No, it was in War... Two brothers (siege masters), or something like that, were so scared to attack that one of them just gave all his troops to the other... I was laughing! I just wiped them out like they were kids; the second one only had one stack... it was fun.
And on Cana, you need to choose 3 skills in the skill wheel that reduce magic: in Luck, Defense, and Chaos, plus give everyone mini-artifacts against magic and defense, and then you can easily handle Dark and Chaos...