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and secondly, in the second Heroes game, it is possible to upgrade a dragon twice (first to red, then to black).
New here? I'm Roha — want a quick tour?
- unit bonus (number of identical creatures = 2, or simply whether similar creatures exist = 1, if no similar creatures exist = 0)
What does the quantity mean? Does it mean equal to the number of creatures being joined, or more than...?
What is the difference from "simply whether there are similar creatures"?

In Heroes 3, 5 factors are taken into account when joining...
There are detailed formulas, but who needs them? ;)
Moreover, a hero standing in a city in Heroes 2 cannot be dismissed!!!
Great topic!
2 DmitryAS The Library of Enlightenment gives +2 to all skills. I think... :)
Therefore, having a lot of mana, some ranged units (like towers in a castle), or a disposable unit (vampires, fairies, thieves), you can attack the enemy without consequences, blinding them at the beginning of each turn until the mana runs out.