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if you first level up a hero's Combat skill, and then, since the game continues, you decide to level up Scouting, you get a Ranger. And then what? Where do you put the experience points?
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You can choose either Nature or Life! :D It depends on your mood! :D
And regarding griffins and unicorns, you should have remembered ghosts, bone dragons, ballistae, and many others! :D :cool: