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With pure rage, Orcs don't give their enemies a chance to win; if an opponent allows the Orcs to develop for so long, that's already a bad sign and brings their defeat closer, but the Special Ability simply deprives them of any hope. An attack by high-initiative creatures might only reduce some of the rage points, and nothing more. Unattacked creatures will attack with the 2nd level of rage, and at the 2nd level of rage, they receive very significant bonuses. I think that even Elven and Dwarven Special Abilities won't help much against such an Orc. Although I've never developed to the point of using Special Abilities, and for two heroes with Special Abilities to clash – that's a real fairy tale for me. So, I'm skeptical about them.