Nefarian is a fictional character from the popular video game series World of Warcraft. He is a powerful dragon and the son of Deathwing, known for his cunning and ambition. Nefarian rules over the Blackrock Mountain and seeks to create a new breed of dragons by experimenting on other creatures. In the game, players encounter Nefarian as a raid boss in the Blackwing Lair dungeon. He is notorious for his ability to manipulate and control the environment during battles, making him a challenging opponent. Nefarian's character is central to the lore surrounding the Black Dragonflight and their quest for dominance.