Red, orange, yellow, green, blue, indigo, violet — Seven-Colored Martial Souls.
Each rank was vastly different.
The disparity was manageable up to green, but by the time one reached blue and indigo, the Martial Soul's power was already tremendous.
Not to mention the purple, just the blue and indigo alone were much stronger than the previous colors.
When Xiao Yi left the Xiao Family, his Martial Soul was green.
Till now, after more than a year had passed, only today, having absorbed the Martial Soul Power of over ten thousand Martial Artists, did he finally break through to the color blue.
One could imagine how big the gap was between the green and the blue.
Xiao Yi guessed that achieving blue for his Fire Control Beast after its current state of green would be even more difficult.
Martial Souls below the color yellow were basically of little use.
