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I'm playing the last campaign, mission 3. If Raileigh isn't present, the game will lose a lot. In my opinion, he's the main hero. Tieru sends him to the orcs, but he doesn't appear there. Fayden didn't appeal to me; the Sylvan race is weak, not like the Dungeon race. When you play against the Sylvan, they're tough, but when you play as them, they're completely useless. In general, there are many strange things in this game. For example, in the campaign for Arantir, hired demonic heroes kicked out my archmage and 165 higher vampires. In the orc campaign, I liked the last mission. The mage put up a fight, and Alaric captured two orc castles, then just hid in a Necropolis castle and stayed there without venturing out. I took back the orc castles, gathered an army, and easily defeated him.
Added 7 minutes later
You build a traveler's hut in the city, level up your hero to level 15, buy an amulet in the hut, go around the city to the water, and that's it.