"Frida's Dilemma" - "Negotiations" [Campaign 1, Mission 4]

Also, all the units of the Haven faction will join you, and there are many of them. If you collect the dwarven artifacts, you'll find paladins in the dungeon, and they will join you in exchange for these artifacts, totaling 45 units. With such an army, you can defeat anyone; just don't give them to the mage in exchange for showing you interesting places. In this mission, I maxed out my dark and light magic skills, so I could resurrect and control units, allowing me to complete it without any problems and with minimal losses.