Shadowrun Legends: Beyond the Pale: The Dragon Heart Saga, Volume Three

In the mission given him by the Dragon Dunkelzahn, Ryan Mercury promises to deliver the magical Dragon Heart safely to the metaplanes, where Thayla and her song are all that defend the earth against the onslaught of the Enemy. But when the protector of the world is swallowed by the Chasm, all hope for the future disappears with her. Now nothing stands between humanity and the greatest scourge the planet has ever known...

AND IF HE FALLS, THE SIXTH WORLD FALLS WITH HIM...

The Enemy bears unlimited power, all of it evil. With Thayla destroyed, and the metaplanes unprotected, the Enemy's army of flesh-shredding beasts is about to lay waste to the world. As the ultimate battle is waged between the forces of good and evil, Ryan and his dauntless shadowrunners have only two options: total victory or certain destruction...