I'm a Daeva of Zephyr in the service of Empyrean Lord Vaizel, but I came here at Lord Ariel's request to investigate before the Hymn of Aion Legion arrived.
The Aetheric Field, created by Empyrean Lord Siel during the Cataclysm, protected Iluma until recently. All of Atreia used to be like Iluma a thousand years ago.
Still, even this region has changed since the Aetheric Field fell. I believe it's due to the Tower of Eternity fragments scattered all over the land. Intriguing, yes?