The Reincarnation Spirit Pattern that Du Fei obtained was the transformation of the fundamental principles of nature, so naturally, it contained some ingenious methods to stimulate mental strength. Although at this moment, Du Fei might not have fully grasped the rules embedded within the Reincarnation Spirit Pattern, he had mastered a part of it. In terms of controlling mental strength, he had become countless times stronger than before. Otherwise, even if Du Fei had already advanced ...