Aion: Echoes of Eternity

In ancient times, the Cataclysm shattered the Tower of Eternity. Siel, the Lady of Time, gave her life to establish a massive Aetheric Field, and by these actions prevented Atreia from being destroyed outright. The Aetheric Field caused the ancient, sacred lands around the tower to be locked in stasis, and banished all who would threaten the tower's sanctity.

One thousand years after the Cataclysm, the Aetheric Field is shrinking. With the thawing of time, the lands have once again awakened, and the Cataclysm has slowly started to progress again and threaten the existence of all Atreia.