The Core has existed as long as Millmeria. Without the Core, there would be no Millmeria. It wouldn't be an exaggeration to compare the Core to Millmeria's heart. And it has remained as such from Millmeria's creation to the present time.
It has remained unchanged through countless eras and ages. When Millmeria was nothing but a splotch of hot dirt floating around in the universe, the Core kept it together. The Core sustained life. It gave Millmeria the spark it needed to kickstart the cycle of existence.
From that point, the Core has accompanied Millmeria through every imaginable change. It was there before the world's defenses cracked and the Calamitous Cycles began. It was there when the First Calamity struck and the First Hero saved the world.
