Long ago...
In the world were all Human Being, Demi-Human, Mythical Creatures and the God who created the World of Azuregard lived together in harmony.
Then One day, Everything changed when the God's Envoy stole the Staff of Ainz Ooel Gown, a powerful vessel were symbolized the world where might and power stored.
The God's Envoy wanted to be a most powerful being. He was never contented in his position, Instead he desired to be God like and take over the rule of the Azuregard.
The God of Azuregard was betrayed for his Envoy's action, So he fought his own delegate and decided to annihilate the Staff of Ainz Ooel Gown and spread the might and power across the world.
But in replacement on his action by using all his power. He vanished.
At any given time, only the chosen one by the God who can capable to control the Lost Magic and can bring back the balance and ruled the world who serve as Lost Phantasia.