[@Altered Tundra]
Sure. That's perfectly fine. Good choice.

To give some more clarity on 'magic': think of it as spirits projecting their element in the physical world in order to protect their host sanctuary, the Guardian. When magic is used, it's more like "hey, look, here is danger to your sanctuary--attack it" rather than the Guardian him or herself creating or manipulating an element. Your 'Fire Aura' choice is much more in line with this thought.