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Generally, attempts to convince anyone that the Dark Knight is stronger than everyone else are quite unsuccessful. He loses even to his "red" counterpart because, despite having higher combat stats, he deals significantly less damage. In a battle, for example, 1 Crusader Knight against 1 Dark Knight is easily won (of course, not counting the hero). The Crusader Knight simply stands in a defensive stance, waiting for the Dark Knight to approach, and then burns him with one and a half times the damage. Even higher health and the Dark Knight's first strike won't save him.