Before the arrival of the sixth demon, I explored the entire map with my assistants and completed all the side quests. The 32 phoenixes I received for them were completely useless – there was nothing to kill, and the freed hero wasn't helpful either.
I gathered so many creatures in three castles that I could defeat the sixth demon in a head-on attack, not to mention simply meeting it with a combat group of seven and weakening it by 70%, fleeing, and then meeting it again to finish it off.
I thought the game would end after the victory, but no, I have to stand at the entrance to the portal and wait for the next one, and there is ABSOLUTELY NOTHING to do except press the "next turn" button.
