The princess harvested the remnants of her energy and funneled it all onto the tip of her horn. It radiated brightly with purple magic. A beacon of a thousand lumens in the middle of the night. She felt like passing out, like crumbling to dust. Her legs quaked and hardly supported her own weight anymore. Every single muscle burned and twitched with fatigue. Miraculously, she managed to power through the magical exhaustion that strangled her from within.