The Body-Piercing Formless Sword Qi was indeed Zhou Yi's original creation.
After cultivating the Epiphyllum Treasure Tome for a long time, his True Qi was vast and inexhaustible, and he comprehended many profound usages.
Among them, most were inspired by the martial paths of predecessors, such as the Dragon-Grabbing Hand and Protective True Essence, etc. Only the condensation of True Qi from the major acupoints in the shoulder blades and ribs to form arms could be described as unprecedented.
Zhou Yi simplified it and compiled the Body-Piercing Formless Sword Qi.
Once mastered, Sword Qi could be shot out from any major acupoint in the body, catching opponents off guard.
The Undying Golden Body was based on the Vajra Indestructibility Divine Skill, incorporating external cultivation techniques such as the Golden Bell Shield, Iron Shirt, and Iron Head Skill, forming a combined internal and external strengthening method.