Onyxia is a fictional character from the popular MMORPG World of Warcraft. She is a powerful black dragon and a key antagonist in the game, known for her cunning and manipulative nature. Onyxia is the daughter of Nefarian and serves as a major threat to the kingdom of Azeroth. In the game, players can engage in a raid encounter to defeat Onyxia in her lair, the Onyxia's Lair dungeon. This battle requires teamwork and strategy, as she uses various abilities to challenge players. Defeating Onyxia rewards players with valuable loot and contributes to the overarching storyline of the game.