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If we consider individual creatures from the factions in Heroes of Might and Magic V, the most powerful is the Archangel. Its attack and defense are well-balanced, it can resurrect units, deals consistent damage, has a good amount of health, and its speed and initiative are above average. Level 6 creatures are Paladins. Level 5 creatures are Lich and Unicorn. Level 4 creatures are Druid and Succubus. Level 3 creatures are Elves. Level 2 creatures are Archers and Furies. Level 1 creatures are Assassins.