Story and voice acting.

I realized there was a significant error in the campaign's plot: Azkaal mentions in a conversation with Kirill that they will need to cross the entire Shio to reach the Claw of Urgash, conquering Azkaal's former territories along the way, now occupied by other archdevils. However, Azkaal was imprisoned by Michael eight centuries ago, even before the Elder Wars and the Birth of the Seventh Dragon, when Shio didn't even exist; Sar-Elam created it in the 40th year of the Common Era. A smaller, but similar error: Michael mentions that he "defeated the Princes of Shio." Again, Michael died long before Shio was created. On the other hand, it could refer to the Demon Princes, that is, the archdevils who later became the Princes of Shio when the demons were imprisoned.