"The Golden Seal of the Jade Realm of a Thousand Mechanisms" was discovered by Kou Hong and Dao Xuanzi in the remains of Heavenly Machine Sect, located in the Hundred Stone Cave Heaven on the border of Shilin State. Although it is only about Nascent Soul Cultivation Technique, it can sense aura and understand causality. Without it, Li Fan would have never comprehended the Formless Killing Machine technique.
"The Secret of Swapping Day and Night" was given to Li Fan by Sikong Yi, the successor of the Stealing Heaven and Earth Sect. It can snatch the laws of destiny and create a doppelganger, truly worthy of being called Swapping Day and Night.