The Oración Seis arc (also known as the Nirvana arc) is the ninth story arc of the Fairy Tail series. Fairy Tail opts to form an alliance with Blue Pegasus, Lamia Scale, and Cait Shelter in order to destroy one-third of the Balam Alliance: the Dark Guild Oración Seis. However, the task proves not be an easy one, as they face their strongest foes yet.