(Yeah, I use and aura/energy and element based system… base elements are Fire, Earth, Air, Water, Shadow, Dark, Light, Illusion, Reality, Chaos, Harmony, Sound, Ice, Mind, Soul/Spirit, and Star.
Different elements also have affinities for each other, (Ex, Fire has an affinity for light, and shadow has an affinity for dark) and different elements also clash more harshly, (Ex, Fire and ice, mind and illusion, dark and light) and others are more ambiguous (Ex, Reality, Spirit, Star, Air,) And the ambiguous ones generally end up being influenced by another element, (Ex, Air element combined with shadow,)
Also some elements also hold different aspects, Like earth, which can be broken up into 3-4 main ones, Nature (Plants and/or animals) Earth (The actual ground, and rocks in general) metals, and crystals/gemstones. (The last two are rarer and certain metals/crystals/gemstones affect different elements in different ways. (like blocking or strengthening powers))
ALSO keep in mind not all elements have affinities for other elements, sometimes you just have a pure fire element, though it's pretty uncommon for someone to NOT have some affinity for something else, and if not, thye can usually learn an affinity or pick one up later. (think something along the lines of training a mage in different arts, they specialize in one area, but can pick up tricks from other areas too.)
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(So Sirus for example, is a powerful shadow element, with an affinity for dark and illusion elements, and a teensy bit of mind magic. And because he's wolf, he has a "wild" nature affinity too, which is a special type of aura energy that's more in tune with the innate or non sentient auras & energies around him.)
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(Sorry that's so long, meant it to be a SHORT explanation… XD…. Also happy 2021!)
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Sirus simply nodded acceptingly, not wanting to give away too much, even though he related more than he wanted to. Try being the invisible freak that's supposed to be a royal…