Aeternum Arc

The Aeternum Arc (アエテルニャム アーク, Aeterunyamu Aaaku) is a storyline that follows the dark king Kladenets and his Nine Elementals in their attempt to obtain the key to what is known as "Project Ether". This project would give Kladenets the power to recreate the "One Magic", or the original source of magic, as well as be given one wish. This wish is to erase all creatures and users of god, dragon, and demon slayer magics from Earthland and banish them to another world. Kladenets would then retain the ultimate power of the new One Magic, as "Earthland Eternal Mage King" for all time.

A great problem arises when he finds that the key to his project lies in the hands of the Toveri Alliance, the largest coalition of guild's in Ishgar. Refusing to hand over the key and let Kladenets cause a mass genocide of the living beings of their land, Kladenets declares war on their nation and effectively starves out their trading routes until they comply. Not wanting to let their land and their people face the anguish of war once more, the Toveri Alliance decides on invading the land of Aeternum to take the fight to Kladenets and put a stop to his madness.