I have another question: in the last mission of the last campaign, Kujin, Godric's daughter, Ilia, and Wulfstan will be fighting alongside the demons. Am I right? So, I need to level them up. That makes sense, except for one thing: how do I level up Ilia? I can't play as her; she just talks to Zephyr at the beginning and end of the first mission of the mages. And that's it.

The dwarves have a very cool thing – "Runes." And so-called "Runic Magic." In addition to the spellbook, magical symbols are drawn above the turn order bar. They can be used by any units in your army. Many of them are extremely useful. For example, if you take the Rune of Energy, your units will have a huge attack range, etc.