Instructions
Kill kunduns in Arena2, Crywolf or Kalima7 on the world map. Kill the kunduns until you obtain an ancient item drop.
Go to Noria and purchase one creation from a shop.
Go to Devias and purchase one chaos from a shop.
Travel to Atlans and fight hydra until you obtain 30 bless. Make sure you have at least 30 zen -- the unit of in-game currency -- in your pack as well.
Go back to Noria and go to the Chaos machine. Place 30 zen, 30 bless, one creation, one chaos and the ancient item into the machine. Press "Create" to make the condor feather.