Heroes of Warcraft: the Frozen Throne

After the Burning Legion's plan to fully invade Azeroth failed, the Scourge's supreme leader, the Lich King, and the Burning Legion's supreme leader, Kolgerton, had a complete break. Therefore, Kolgerton sent the demon hunter Illidan to destroy the Frozen Throne and kill the Lich King. The Lich King also sent the death knight Arthas to protect the Lich King from the Frozen Throne in the early stage. After several twists and turns, the two finally reached the Frozen Throne together and started a life-or-death duel.