As I drifted hither to the First, traversing the boundary 'twixt reality and probability, I did bear witness to events yet to come...
There I saw the combined forces of Eorzea and the Far East offering fierce resistance to the legions of Garlemald. So fierce, in fact, that they did begin to push the enemy back. Ilm by painful ilm, then yalm by yalm, and malm by malm in time.
Yet the joy they felt was short-lived, for in so doing, they did force the Empire's hand. Faced with defeat, the Garleans turned to a weapon most vile - Black Rose.
Its potency defied all reckoning.
Once released, the gas took on a life of its own, wreaking untold carnage not only in Eorzea, but in the provinces of the Empire besides. From fighters on the front lines to babes in their beds, none were spared. And as the casualties became too numerous to count, so did the fabric of civilization begin to unravel.
Nor did the land itself escape unscathed. For spreading from the site of its release, Black Rose brought death to the very soil.
To survive amidst the chaos and upheaval, men came to live by the sword, the rule of law giving way, inevitably, to the rule of might. Thus was the spark struck and the fire kindled, and swiftly did it spread, as a blaze in a field of straw, to engulf every corner of the world.
Nations worthy of the name did then cease to exist. And those souls brave and true, who might have risen to restore order... were no more. For the weapon spared not one. Not even thee.
An endless age of war, begotten by the blight of the Black Rose... Such is the legacy of the Eighth Umbral Calamity which I did behold. No matter the cost, we must forestall this tragedy.