From Fantasia Wiki
Vaatu was the name of a Leviathan which was referred to as a spirit of chaos and darkness by terrans. He briefly became the Dark Avatar Spirit during the Harmonic Convergence of 171 AG.
Vaatu was the name of a Leviathan which was referred to as a spirit of chaos and darkness by terrans. He briefly became the Dark Avatar Spirit during the Harmonic Convergence of 171 AG.