It was said numerous times by the devs that the players will get no magic units or spells or whatever.
And you can not mirror the enemy simply cuz they are different races with different inbuilt attributes from the get go. You can only mirror the human factions since those use the exact same stats and perks and equipment. All the others are different in ways that can not be matched. It is designed that the enemy magic is something you can not counter with yours but have to figure out how to deal with it the usual way. The other “races” have clear advantage and that is not hidden in any way, they are supposed to be scary and unnatural. You supposed to feel the dread of being a human leader with a human group in a dark word where not only other humans are a treath but the supernatural thisng aswell, to face enemies that are usually stronger than you.