After Yun Ye sent the message, he immediately began writing the Challenge Letters.
Time waited for no one.
Five years had passed since the Rain World Secret Realm ended.
He had never stopped researching the Origin Law.
With the assistance of the Nine Lives Divine Law, even after leaving the Tower of Creation and suffering a sharp decline in his deduction ability, his research efficiency remained fairly good.
In just five years, he had completed the Ten Steps of Heavenly Road.
The Silent Origin Law had expanded to Yellow Grade High Rank, while his life essence had reached the limit of ordinary laws—ninefold.
Throughout his research, Yun Ye had continually consulted Lan Wuyin, gradually gaining a clearer understanding of spirit bodies.
He thus learned that a single attribute could, in general, only raise one's life essence to ninefold.
The limit of a dual attribute was around eighteenfold.
The more attributes one had, the higher the limit. However, once that limit was reached, advancing any further became extraordinarily difficult, with the difficulty increasing tenfold or twentyfold.
Yun Ye's Extreme Cold Attribute was a dual attribute, with a theoretical limit of eighteenfold. However, an Extreme Spirit Dual Attribute still had its advantages. Not only was its power greater, but raising one's life essence was also easier than with an ordinary dual attribute.
Half the credit for Yun Ye's rapid attainment of ninefold life essence went to his Extreme Spirit Dual Attribute.
And this was the crucial point.
As his research into spirit bodies deepened, the four great grades of Heaven, Earth, Profound, and Yellow gradually became clearer.
Yun Ye discovered that, excluding divine ability bonuses, a spirit body basically gained threefold life essence each time it rose by one minor rank.
The lowest, Yellow Grade Low Rank, had threefold life essence, while