Keeping the damn equi-form aloft had been hard enough to swing while wholly hale and hearty; Imogen counted herself lucky that she hadn't simply tumbled from the sky, and chose to push fortune no further. Horse and rider descended rapidly towards the ground near Exathun's insensate form. She kicked hooves into motion as the ground approached, trying to land gracefully. It would have been cool had she pulled it off.
Instead, the winged horse stumbled to earth near Exathun's head and staggered gently into a tree trunk, just managing to avoid smashing Iselya into the bark. A bit dazed, Imogen staggered back to the side, trying to keep her feet (too many feet!) beneath herself. She shook her maned head, trying to stop the world from spinning quite so much.
When it did, she almost regretted clearing her head.
The great wyrm lay spread before them on the ground, smouldering... but still alive. Though the dragon was winded, it could stand back up at any moment, and only the lingering flames of courage stopped the Sunsinger's horsey heart from skipping a beat as she took in the sheer magnitude of the ancient creature. Magic or no, Exathun was fully capable of crushing both her and Iselya under a single clawed hand, not to mention what a blast of that cold shadow was apt to do this close.
Yet when Imogen spoke, her candor was cocky as ever. "See?" She whinnied breathlessly to the Dawnmartyr, "Works every time."
This was true, in a technical sense. But although Imogen's spirit was perpetually buoyant in the face of ancient dragons, armies of dark wraiths or, most dangerously, her own stupidity, she could feel her strength running out. The fight with the wraiths aboard the Every Waking Moment, her extended use of the stolen Illumite to ward off the entropic shadows of the eclipse, the rapid invocations of Animus and the summoning of the nova-flame barrier had sapped most of her reserves of aether. Ancient dragons and gods might be able to invoke spells for days on end, but an Orkhan girl quickly found herself longing for rest.
"...but I'll be honest, that took a lot out of me." Imogen confessed to Iselya, "I might still be able to summon my Arsenal once more, but that's it, and I don't know if that alone will do it. Up to you whether we should still try to cleanse this dragon or seek an ending while we have the chance."