Night wandering—ever since Kirito began practicing the Spirit Transformation Technique, he carried out this practice session every night.
Through repeated night wanderings, Kirito had gradually developed his own understanding of how to use the Spirit Transformation Technique, and his control over it had become increasingly effortless.
He lowered his head to look at the house below. His eyes seemed to possess X-ray vision, allowing him to clearly see the souls of every living thing inside.
This was the Spirit Body's innate Spirit Vision ability—Soul Vision.
With this ability, Kirito could ignore the obstruction of any object and see where another person's soul was.
In his Spirit Vision, every creature's soul was a flame. These flames came in different colors—every color imaginable—and some even contained a mixture of several colors.
Only later, after speaking with Teacher Mito, did he learn that the differing colors of human souls were related to the Chakra Nature they cultivated.
The souls of those without chakra, or those who had not cultivated a Chakra Nature, were white. Once they cultivated chakra of a certain attribute, the color would change.
After learning this, Kirito could not help but think that chakra was truly a miraculous form of energy. It could not only alter the body's bloodline genes, but also alter the soul.
Thus, he boldly proposed a hypothesis: perhaps souls, like human bodies, possessed genes—Soul Genes.
The knowledge involved was far too advanced. For now, Kirito had only proposed a hypothesis. To verify it, he would need to keep growing stronger, learning, and making money.
At a glance, the most conspicuous soul in Nawaki's house was undoubtedly Mito's. The flame of Mito's soul contained seven colors. Needless to say, this had to be because she possessed all five elements as well as Yin and Yang.
However, compared