In .hack//AI Buster Albireo and Hokuto witness the fight between The One Sin and the Descendants of Fianna. Orca and Balmung discover the trick to beating it- the only damage it does is to reflect back the exact same attacks used against it, and its element shifts to the last attack used. Until then everyone had always used their most powerful attacks on it as quickly as they could, and couldn't notice the pattern. Orca and Balmung easily defeat it by attacking with alternating elemental attacks each time. After defeating it, the field it was located in transformed from a frozen wasteland to a normal field, and the "angel" trapped their was released, giving Balmung his wings.
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