Several changes.

You need to delve into the executable file; I haven't seen any mods like that.

Is there a test map available?

Added 3 minutes later

Well, for example, I use this one if I don't need to test a battle. For testing a specific unit in battle, I use the "Duel" map. In special cases, I create my own maps.

Thank you. That's exactly what I needed. And happy holidays.
Another question: how do I change the order of creatures on the recruitment screen? For example, I've placed Djinns in tier 4 and Mages in tier 5. How can I make it so that Djinns appear before Mages on the recruitment screen?