What was Colorless Haki?
Colorless Haki was the higher realm of Haki formed when Armament Haki, Observation Haki, and Conqueror's Haki had all reached their peaks and merged into one.
It was an elevation of will and spirit. Even if the body was destroyed, with the support of Colorless Haki, the soul could refuse the call of the Underworld's will, remain in the human world and live normally, or even enter other objects and control them.
It possessed every ability of Armament Haki, Observation Haki, and Conqueror's Haki.
Yet every aspect of it was massively enhanced, because this was not a quantitative change, but a qualitative one.
In terms of appearance.
Though it was called colorless, it possessed a unique color that came from the depths of the user's heart.
At the same time.
Colorless Haki could condense colorless lightning far more powerful than the Mental Lightning of Conqueror's Haki.
Not only did it retain the basic effect of inflicting a fierce shock upon living beings' wills and minds, it also possessed every physical property of natural lightning. It was equivalent to a lightning-type Devil Fruit User without elemental transformation, yet without any weaknesses.
But the most crucial advantage of Colorless Haki was that it could continue growing with almost no upper limit.
To use a more vivid analogy, one could compare it to speed.
Three-Color Haki and Colorless Haki were like below the speed of sound and above the speed of sound, with the sound barrier being the dividing line between them.
Cultivating Colorless Haki meant officially breaking through the sound barrier.
What came next was merely a matter of how many times the speed of sound one could reach, until one eventually encountered the speed of light.
The gap between the speed of sound and the speed of