Both are legendary, one exists in the present, while the other resides in the future.
Greeth stared at the celestial palace of the prehistoric era. The Chu Heavenly Emperor atop the myriad layers of the blood ladder was just a phantom image, yet it brought an overwhelming sense of oppression.
His eyes flickered, but he did not draw his blade.
Such a special situation also has examples in the Abyss.
For instance, a Demon kingdom being conquered by a legendary figure from an enemy nation, a Prince escapes, and decades later, the Demon Prince becomes a legend, annihilating his former enemies.
A legend is not bound by time, enabling the Demon Prince to ascend to legend and slay another legendary figure, a task near impossible.
Because a legendary expert can retrospect time, eliminating future enemies from the moment of birth, leaving no chance for development.
When you oppose a legend, they can leap to your point of birth, and kill you effortlessly.
