The process was long. With no other choice, Li Wan'er sent a clone outside while her true body remained in the Magma World, slowly adjusting.
Ten months later, her Nascent Soul and physical body finally moved as she wished. She could merge them or separate them at will.
She had finally broken through to Spirit Transformation. With her task complete, she took one step and appeared above Jia Nan Academy.
The moment she emerged from the ground, she sensed something. She vanished again, reappearing deep within the Black Domain Plains.
Boom...
The Heavenly Tribulation had begun. A bolt of purple divine lightning descended from the sky. Li Wan'er resisted it while using the Lightning Tribulation to temper her body, strengthening her flesh toward physical immortality.
At the Spirit Transformation stage, the Nascent Soul was relatively stable, but she still had to endure the Lightning Tribulation.
After entering Spirit Transformation, cultivators had to seek a way to unite the five elements, bringing themselves into harmony with the spiritual energy of heaven and earth. They could then draw upon the Yuan Qi of heaven and earth at any time, uniting the five elements and becoming one with the world.
Within their allotted lifespans, they would neither decay nor perish unless someone stronger killed them.
Compared with Nascent Soul cultivators, the gap in cultivation to Spirit Transformation was not insurmountable. The chief difference lay in the physical body.
Spirit Transformation cultivators had to strengthen their Divine Souls and overcome the Heart Demon tribulation. They also had to survive the Five Elements Tribulation.
Once their bodies and Primordial Spirits grew strong enough, they could bear the laws of heaven and earth and gradually draw upon them.
This was true Void Refinement, worlds apart from the Void Refinement of the Taiji Xuanqing Dao in Jade