Hello, as mentioned in the description, the map was tested on the original Heroes 5. The changes were related to reducing the mana cost of the Fireball spell to 8 mana units. As far as I remember, when we discussed this map with Khottabych about a year and a half ago, playing through the add-ons could also cause some strange glitches with the Fireball spell, so it is recommended to play through the original version, as everything works there.
Мой канал по King's Bounty - "Remix Play"
Моя группа по героям 5 - Здесь отвечу быстрее