We already got some Infos on the official Aion2 Website about the Story of Aion2
The collapsed Aion Tower
At the end of the Celestial War, the Aion Tower collapsed. Amidst distrust, the barrier failed to be established, and the clash between the three races swallowed up the light of the world. The tragedy of that day would later be known as the "Last War."
divided world
On the day the tower collapsed and the barrier disappeared, the dragons flocked to the heavens, and the remaining gods used their last strength to build a wall...
Between Eltenen and Interdica, a curtain of light rose, dividing the worlds and binding the heavens in a silent severance.
Ciel's absence, a line drawn in blood
Like the sacrifice of the god who protected the world long ago, this barrier was also built through painful sacrifice.
Ciel, the tower's guardian, vanished, and the remaining five gods poured all their strength into completing the barrier. Some perished, others quietly lost their light. But at the end of these sacrifices, the barrier was finally completed
Shadow of the Dragon Lord
The moment the barrier disappeared, Atreia gained the name 'Battlefield'.
Ishtar and Fafnir - the two dragons were unstoppable, devouring Poeta with fire and shadow.
Beyond the celestial barrier, countless lives were lost at their feet.
Fallen Blessing, the Fall of Daeva
Beyond the barrier, Deva's awakening was no longer a blessing.
Under Ishtar's command, the Devas were hunted and made into fuel for the Surana.
Those used in the experiment were eventually revived as mutants and turned their swords on their own kind.
In this way, the light of blessing was covered with a curse.