It's simply impossible to provide significantly strong defense for Foundation Establishment Cultivators.
This is why Zheng Yi places great importance on the significance of this cultivation technique, "Formless Innate Qi Gathering and Scattering Divine Light." Once he's able to cultivate it, his body refining will also break through the Foundation Establishment Realm, and his defense will be dramatically enhanced.
However, according to Zheng Yi's observations, this cultivation technique, "Formless Innate Qi Gathering and Scattering Divine Light," is not easy to cultivate.
It's a body refining technique based on talismans, requiring the opening of seventy-two acupoints in the body, with each acupoint having a talisman as its foundation, refining the talisman seed, and ultimately combining all acupoints throughout the body, then a divine descent occurs, forming a strong protective phantom.
