The Chaos Dragon is a Chaos Beast from AdventureQuest Worlds. It was first awakened to wreak havoc on Swordhaven when King Alteon, as the twelfth Lord of Chaos, used his powers to transform the dragon statue in the castle courtyard after having unwillingly murdered his own eldest daughter, Princess Brittany, in his madness, just when she had gotten married to Lord Brentan. The dragon then began to cause destruction in Swordhaven and Swordhaven Castle. The players and Lady Celestia headed to the roof where the dragon was, and Celestia watched as the heroes defeated and slew the dragon. The roof of the castle collapsed under the dragon's weight.