The second and third levels of Nonuple Body Tempering were actually about condensing two Spiral Forces and three Spiral Forces, respectively. The incremental power from being able to unleash two or three Spiral Forces simultaneously in battle was simply terrifying.
The reason the Invincible Fist Sage was called such was that his fist technique had reached an incredible level, enough to be considered a Sage. Just based on his Nonuple Body Tempering alone, it was definitely a name he lived up to!
Lin Feng practiced the second and third levels of Nonuple Body Tempering every day. Actually, the principles of the two levels were the same, and they could be practiced simultaneously. The only difference was that there was an additional Spiral Force.
However, during the practice, Lin Feng discovered the most critical aspect of Nonuple Body Tempering: the physique! How strong would the impact from a burst of Spiral Force be?