There is no way to complete the scenario with 900 Cyclops in Heroes of Might and Magic III.
"Rune of Energy" - to break through to the castle, "Rune of Dragon Form" - to significantly strengthen your troops, "Rune of Resurrection" - if you have suffered significant losses. If you don't have these runes and good magic, it's better to replay the previous mission and develop Wolfshtein well :).
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