Early July.
The blazing midday sun hung high overhead.
Even in the dense forest, the verdant leaves had wilted, their heads drooping.
Third blood exchange—let it go smoothly! Jiang Ning thought.
By this day, the transformation brought by his second blood exchange had already ended.
His physical constitution had strengthened by another degree and settled into a stable state.
This showed that he could undergo his third blood exchange.
Compared with the first two, the significance represented by the third blood exchange was entirely different.
Most veteran Grandmasters and old-established Grandmasters had completed no more than three blood exchanges.
As for the fourth blood exchange, compared to the third, their numbers instantly plummeted to only twenty or thirty percent.
Any powerhouse who stepped into the third-rank Grandmaster realm could, with the accumulation of time, reach the third blood exchange without much difficulty.
But taking another step forward was a watershed, with the difficulty suddenly soaring.
For the fourth blood exchange, one either had to find a Grotto-Heaven secret realm left behind from the Primordial Era and rely on the spiritual substances contained within its heavenly treasures, thereby completing a fourth blood exchange, awakening the human body's potential once more, and achieving another evolution.
Or one's opportunity had arrived, and one comprehended the unity of Heaven and man, using the spiritual mechanisms of heaven and earth to complete the fourth blood exchange, thereby transforming into an imperfect Heaven-Man Grandmaster.
Neither of these methods was simple.
The Grotto-Heaven secret realms left behind from the Primordial Era had basically all been developed.
Over the past century, news of a newly opened secret realm had become exceedingly rare.
Often, three to five years—or even eight or ten—would pass without news of a new secret realm opening.
Without a new secret realm opening, completing the