doesn't feel magical exhaustion

I raised my frost-coated right hand, gathered my will for another spell—
—and found a patch of white blankness in front of my eyes. I blinked and suddenly I was sitting on the ice next to Harvey, wondering how I’d gotten down there.
Winter, I realized. I called up too much power, too fast, with too little chance to rest. I’d burned up my reserves of magical energy, to the point where it threatened to rob me of consciousness. But even now, I didn’t feel magically exhausted.


Skin Game Chapter 18, Page 133-134