Ice and Fire

And a question about mods... You said that it's not possible to upgrade creatures because of some mod... How can I see what mods I have installed? In theory, I shouldn't have any – I downloaded a collection (3 parts + additional campaigns). Currently: The Imp cauldron is there, but I can't upgrade it. It was the same in the original campaign – in the 2nd mission for Zehir. Duncan and Frida capture a Castle. There were only alternative upgrades, and it wasn't possible to upgrade peasants into Cutthroats, only through a Fort. I could buy Cutthroats just like here. So, I'm wondering – is this because of some mod, or is it supposed to be this way? Added after 4 minutes

A two-way portal takes the hero to the other side of the Castle, i.e., bypassing the garrison. But this path will also be open to the AI.

Sooner or later, it will break through anyway... you can try it.