^^" Alrighty, upon which case, I have two more question about mages.

Would the event be directly related to the power? I mean, for example, in Puella Magi Madoka Magica, one's unique powers are based upon what wish they make. For example, (minor spoilers), Sayaka wishes to heal the hand of Kyosuke, which, without her wish, wouldn't have been able to be saved, such to the limitations of the current day's medicine. Resulting from her wish, along with the usual powers of a Puella Magi, she also has the power to heal much quicker, and even block out pain (though that doesn't mean she doesn't actually get hurt-she just can't feel it.) In other words, would, for example, a traumatic event involving fire result in magic that would revolve around something to due with fire, or could the magic be something else entirely? 

Also, what are the limits to magic? Is it an exhaustible source? Is it limited by the condition of the user's mind? Can it be used indefinitely, but at the cost of something, such as shortening one's lifespan? Something else entirely? 

I appreciate your answers. :3