For a Mortal World Immortal, three transformations were actually brief, merely the initial stage of a Mortal World Immortal's transformation.
But for the Great Yin Human Emperor, the long span of three lives had allowed him to explore many different paths to immortality.
The Great Yin Human Emperor had once studied the paths to immortality that existed before ancient times, and had also researched the cultivation of a single secret realm within the human body.
All of that had now become the Great Yin Human Emperor's legacy, serving as reference for Yang Qing's research into the path to immortality.
What concerned him most, without question, was Immortal Medicine. The Great Yin Human Emperor had studied Immortal Medicine for a very long time.
Even the reason the Great Yin Human Emperor had successfully lived into his third life was related to his research into the various mysteries of Immortal Medicine.
"What exactly is hidden behind Immortal Medicine?" Yang Qing muttered.
Every stalk of Immortal Medicine was extraordinary. Throughout the ages, many Emperors and Ancient Emperors had studied them.
As far as he knew, Immortal Medicine contained a great secret of the world. It was suspected to be connected to immortals, perhaps even formed from immortals who had fallen in the past.
If one wished to become an immortal, how could one avoid studying the mysteries of immortals?
Over the long years, quite a few Immortal Medicines had appeared in the world, but most of them had fallen into the hands of the Forbidden Zones of Life.
With the Forbidden Zones of Life vanishing from the world, finding another Immortal Medicine was undoubtedly harder than ascending to heaven.
He had once obtained an Immortal Medicine, the Ancient Life Tree, but he had already given it to Ji Xukong.
He had no intention