At the beginning, I don't upgrade it because I don't want to sacrifice magic. But even if I take the 1st or 2nd level of Summoning early on, I don't think anyone will attack me in the early stages. Especially the AI. And it seems like we're talking about the AI.
Added 1 minute ago
They disappear :(
Added 5 minutes ago
Well, I'm definitely not one of those people. :D I grab the entire assortment, and then I'm surprised why my hero moves so little (as I said, I always build Elves). :D :smile40: There's no guard in the castle, of course, so I run around, and recapture all the cities... :D :smile52: But the hero's army is quite strong...

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!