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Chaos Lord Alteon is the ruler of Swordhaven who had been battling the corruption of Chaos from Drakath's first appearance. As of the Chaos Wedding event, he has been consumed by the Chaos and has awakened as the twelfth Chaos Lord. He was formerly the king of the Good Kingdom of Swordhaven, where he was succeeded by his son-in-law, Lord Brentan As a Chaos Lord, he stood with his own Chaos Beast, The Chaos Dragon .
- Chaos Lord Alteon is the first and only Swordhaven king to become a Chaos Lord.
- He is the second Chaos Lord to have come from Swordhaven; The first one being Chaos Lord Lionfang
- He is the second good Chaos Lord; The first one being Professor Iadoa.
- He is the only Chaos Lord whose armor is non-member; The Chaos Lord Alteon (Armor).
- A similar armor to Chaos Lord Alteon's, The Cyber King is based on the Chaos Lord's armor, only cybernetic and more bluish.