wolfcat, in this thread or a similar one, people have repeatedly posted a mod for Ifrits that could be displayed in the map editor. Browse the topics or use Google – I think you'll find it without any problems. Such a mod already exists
And what's the point of that?! Otherwise, a person can simply add one file and edit a couple of things, and they'll be happy, as will everyone who uses their creatures!

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