Zheng Zha mainly cultivated the body-tempering technique known as the "Twelve Divine Generals Manifestation." To activate his Desolate, Heaven-Opening and Earth-Creation technique, he needed an immensely powerful body to support the force it unleashed.
Cultivating this body-tempering technique would help him make better use of that power.
He began with the Qiangliang Manifestation, which commanded wind and lightning.
With the foundation he had built through cultivating the Lightning Release Chakra Mode and the Eight Gates, coupled with the Divine Dragon Bloodline awakened by Dragon Leap, Zheng Zha's physical strength far surpassed everyone else's.
He directly consumed Chakra Pills refined from an entire Divine Tree Fruit in one gulp. Bolstered by the potent medicinal power, he progressed rapidly and soon cultivated the Qiangliang Manifestation to mastery.
At this point, the combat strength his body could unleash was already no weaker than that of a Nascent Soul Stage Cultivator.
He then continued consuming Divine Tree Fruits and cultivated the Zhurong Manifestation among the Twelve Manifestations.
He still entered the path in an extremely short time and pushed his cultivation to mastery. After that, he began cultivating the Gonggong Manifestation and Houtu Manifestation, mastering them just as quickly. His physical strength rose directly to an entirely new level.
He was already no weaker than a Cultivator at the peak of the Primordial Spirit Stage.
Then his cultivation stalled there.
Because he had not overcome his Inner Demon, he could not completely unite his Essence, Qi, and Spirit to reach the Integration Stage. As a result, the vast blood and vitality within his powerful body boiled out of control, even threatening to injure those around him.
To resolve this issue, Zheng Zha began concurrently cultivating the Profound Extreme Blood Spirit True Scripture, a Blood Cultivation technique capable of refining his own bloodline.
He expended