Antonidas was a powerful mage of great influence and the leader of the Kirin Tor of Dalaran. A young prodigy, he had already written theses at the age of twelve. He quickly rose through the ranks of the magus order and became a leader of the nation. During the Second War, he pledged loyalty to the Alliance of Lordaeron on behalf of Dalaran, in the war against the orcs. Mentor to young Jaina Proudmoore, Antonidas would be killed during the Third War by the death knight Arthas when the undead Scourge invaded the city.