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I played this scenario from the "Heroes of Might and Magic" series before. I replayed it. I think anyone can complete it on Grand difficulty. It's very easy. Basically, there are about 5-6 battles of moderate difficulty, and that's if you try to play without losses. At the beginning, I was playing as Dungeon and quickly conquered everything. Under the castle, 65 Gorgons joined me – they were just expendable units. I mostly lost them. I was hesitant about whether to take Chaos, and I was right not to. It wasn't useful at all. Basically, the map is completed using a few spells: Mass Slow, Resurrection or Regeneration, and a couple of times Berserk or Dominate, depending on the situation. All the necessary spells are either in the castles or in the library, and there are also 2 books of Light and Dark magic. Thank you for the game.