Welcome to the wikia! Unfortunately enough I had to revert some of your changes to the categories. For instance, you added the "Enemies" category to the "Uruk". However, an Uruk does not necessarily have to be an enemy, and this does not make sense on the Special:CategoryTree. The "Characters" category also does not belong to the races categories, as pages about Elves do aren't necessarily about characters.
However, the Rangers category was an excellent addition!
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