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And this guild isn't even needed. Magic instead of skills – that's interesting.
But in general, Heroes isn't really an RPG...
In King's Bounty, such a skill system would be appropriate – in Heroes, in my opinion, it wouldn't work. Even if it eliminates cases where the generator throws in all sorts of useless things and doesn't give you the skill you need. But that's always been the case; it's one of the elements of the game.

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!