Codes cheats for Heroes of Might and Magic

Heroes of Might and Magic - Game cheats, tips and tricks for Gameboy Color

Random magic spells
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Enter a battle and cast a spell. Press B at the targeting
screen to cancel the spell. A new random spell will now be
available at the end of the spellbook. Note: Do not use the
"Teleport" spell if it appears, as it will crash the game.