Wizard – “Audacious Wizard” [Campaign 6, Mission 1]

I started playing with a hero, and everything was going well. I defeated the weakest garrison, which was closest to the castle, and then I noticed that the enemy had holed up inside the castle, and I panicked, thinking, "What should I do?" Then I suddenly remembered my old walkthrough of this map, which said that if you spend a few turns exploring the map, the enemy will come out of the castle. But he didn't come out. I decided to attack on auto-battle with my last remaining strength, because I was too lazy to think, and to my surprise, I won! Only 3 golems were left alive, but that's okay! I completed the map in 2 months, 1 week, and 5 days. I didn't see the point in clearing everything; I only captured all the upgrade locations and leveled up the guild to level 3. There was nothing useful in level 4. P.S. Zehir's skills seem to focus on knowledge, as is typical for mages. I already have knowledge level 9, with 135 mana points and magic affinity. I leveled up the skills as suggested in the walkthrough on Hugogle: spellcasting, dark magic, and education. Light magic hasn't appeared yet.