Demonology

Demonology, under favorable circumstances where there are many neutral troops and enough money to buy them, will allow Inferno to compete even with Necropolis. But its moral aspect... Recruiting and adding soldiers to your army only to deliberately put them in harm's way or even kill them yourself with some kind of meteor shower, blinding some peasants... No, I don't like that! It's criminal! Yes, demonology is a powerful tool, and I myself have used it, and quite successfully, but I won't do it anymore!

Added 2 minutes later
The same goes for recruiting peasants in outposts or adding neutral creatures to transform them into skeletons when playing as Necropolis.