Blue crystal

I replayed the save again after the third attempt. This time, I didn't immediately attack the demon's garrison, especially since I barely managed to defeat it last time, suffering heavy losses and losing an important hero. I went to the mentor, picked up a skill artifact, and near the demon's portal, I defeated a group of Necrodrakes and obtained the Amulet of Mastery – this is extremely important. The demon arrived, but I skipped a turn near the entrance to the dungeon; he emerged and couldn't catch me, and I ran to his portal and easily defeated him without any losses, then flew back to my Castle . Meanwhile, Tey was already approaching the Castle, but after a couple of hero encounters, Nura wiped out his weakened army of 14 Gargoyles . After that, I immediately sent Nura to attack Tey's garrison. The demon didn't try to capture my Castle but chased after her. Tey's garrison fell just one turn before the arrival of that extremely powerful Letos . As a result, by the 3rd week of the 3rd month, only the Dwarves remain as enemies, but they are significantly weaker than the others – although they have a lot of units, they cast useless spells, unlike Tey and the Demons.