A Castle with Chaos as a point of return after capturing a city? I chose the Castle of Death. There's a level 1 spellbook on the water there, which allows you to bypass the forbidden summoning of the ship on the map. While the units were spending their turn swimming (I had to send 2 boats, and in total, I placed about 7 boats), my hero got boots from the vampires. Then I fled to my home Castle, and there's a portal (yellow) on the water that leads to the Barbarians. But the point is the same.

Added 5 minutes later

I have almost no experience playing Heroes 4. I just decided to quickly explore the map. This is what I meant in my post, not that you should play with cheats in a clean playthrough. Of course, I was in a hurry and made a mistake by playing with an open map. That's where the "cheater" comment came from. I wrote it without any ulterior motive. And now, a question that just occurred to me: can you cheat freely in Heroes 4, and then everything will be fine? Please tell me more.

The point is that you can cheat more freely in Heroes 4, BUT... Just like in sports, the first three are tested for doping. Or, additionally, the one who raised suspicion is tested, and then EVERYTHING IS SIMPLE. According to the rules, each player should have a save file at the end of the day. By looking at it, you can find out when the hero sneezed, blinked, or farted. (This is the difference from other parts of the Heroes series). ;)