World of Warcraft — Invincible is one of my favorites from this game. A beautiful piece of music. And sounds really great on piano. I cannot provide the sheets, since they are copyrighted by Blizzard...
History of Invincible from WoWWiki: Invincible was the steed of Arthas Menethil, both in life and death. He was the skeletal steed that Arthas rode throughout Warcraft III: Reign of Chaos and Warcraft III: The...