http://www.onyxia.com/
Onyxia’s reign over the world of Azeroth began when she was introduced as the main boss in the Onyxia's Lair raid, which was first released in 2004. Since then, her fearsome reputation has only grown. As one of the most iconic raid bosses, she is a test of strength, skill, and coordination for groups of adventurers. The raid’s difficulty and complexity made it a rite of passage for many players, turning the event into a legendary experience that brought players together, often in large guilds, to conquer her.