Inferno tactics.

Don't you think demons are only made from native Inferno creatures? And what about the army of the second hero on the right in the tavern, the troops from neutral or captured towns and villages, the troops taken from various hidden places – did you forget about them?

No, I understand that perfectly... Of course, there will be many demons, but so many... and that early in the game? In principle, I'm not saying that it's completely impossible, it just looks very unrealistic. More precisely, it depends on a lot of luck, and as far as I understand, to use this tactic, you'll have to give up the standard development path for Inferno.
After all, 40 Demons is no joke, how many "sacrifices" are needed to summon such an army... and how much money and other resources... I think it's easier to use that money to develop your town normally.
Besides, let's say we take Utopia with such an army. But what will the losses be, and most importantly, what's the point?