Pure genius.
I would be happy with a horker mount, however.
...This is it. The moment of glorious victory or Tamriel's last hours. The evil of an old world and hero of a new era stood still within the eye of the storm, eyes locked together, thick fog weighing down spiked back and strong shoulders. The dragon roared and took a step forward, dragging one broken wing behind and raising the other above it's heavily scarred head. His tail swished, smashing and breaking a nearby rock into million tiny pieces. The Dragonborn kneeled down, silently placing the handle of a shattered sword on the ground. The sword that had slain numerous sabert toothed beasts, cut off a giant's head once and teared the etheral flesh of atronarchs. It spilt the blood of innocent and guilty alike, serving his owner faithfully till now. Catching it's own reflection, the Dragonborn glanced into the dirty ice. Bruises, cuts, an open wound or two and blood. Blood of the dragon, blood of the hero mixed together, blackened and sticking to the skin like a wondrous infection. The battle of teeth and metal, of fire and magic has ended. Words shall decide the fate of Nirn.
The Dragonborn smiled, stood back up, took off the helmet and threw it away. It hit the ground with a loud clink and was forgotten. The dirt and the fog of Sovngarde weaved together, swallowing the helmet and handle alike then drinking the spilt blood, thirsting for more. Fingers touched the lips and tongue as a soft whistling was heard by the land. The answer came and it came in the form of a legendary beast like none other. The ground trembled and a loud trumpeting raced through the air as the hulking mountain of a creature waddled it's way to the battlefield. The hero mounted the saddled monstrosity, giving a light pat to it's neck. 20.000 pound of muscle and thick skin armed with tusks sharpened to pierce the still beating heart.
Alduin charged and roared the words of blizzard and storm, calling down lighting and ice on his enemy. Red eyes flashed with hatred and hunger, mouth hung open inhaling cold air and exhausting the stale breath of death. The Dragonborn shouted, getting weaker with each syllable as the unrelenting force of the voice shot through the dragon, ruptruing several delicate organs in it's way. Staggered and heavily wounded but not yet defeated, the god of destruction arched his neck and with the damaged lungs not roared but merely rustled the words to mark the hero for death. The battle was over. Or at least it should have been. The Dragonborn spurred it's mount, loyal companion and last friend to be alive. The grip on the bridle started to slip as lifeforce got svcked out from the battleworn body but it didn't matter at this point. Horker and it's rider understood each other without words or a rein.
The majestic creature trumpeted before lunging forward and sinking it's deadly tusks into the soft underside of Alduin, rauaging the tissue and leaving a gaping wound in it's way. And just inches beneath the wound lay the heart of the world eater. The Dragonborn drew up whatever force was left within and howled the words of force one last time. For a moment time seemed to just pause. The heart became still then exploded, fracturing the rest of the body as no weapon could. The destroyer's body trembled then fell, burying the Dovahkiin and it's Horker beneath it.
It was then that the new era had begun with the tyran't remains engulfed in flames and the soul of a true hero and it's tusked companion resting in Sovngarde...