The Scepter of the Underworld hasn't been taken, right? So, when completing the mission, the hero runs back long distances, wasting many turns?
Have all the missions for all the altars been completed? Have all the Inferno cities been captured?
Added 1 minute ago
After completing the main quests and receiving information in the tavern, did you go to the main altar at the beginning of the map?
Yes, all the missions for all the altars have been completed, and all the cities have been captured. I went to the main altar after completing the quest and turned it in. The army increased, but the hero still can't pass.
