Melodic Fantasia was a method Melodicia the Deathless used while trying to create the ancient Melodic weapons. The Melodic Fantasia was successful, but as a result, Melodicia's lab, M-01 was destroyed by Sacerdos, an early evil deathless. He took the Melodic Death, but the Melodic Dark Blades and Melodic Dogma were transported to Saranthia. Then Eiskonig, the evil ice king of Nafusaan and Kreig the dark warlord found these weapons and later served Sacerdos. The three Melodic Weapons were united- in the hands of evil.
Melodic Fantasia was called "Melodia" by Melodicia, the creator of the method.