In the Black Prison, when he refined his natal talisman, he found it to be utterly hollow and weak, looking nothing like a true natal talisman. Having just lost his spirit sword, his Sword Intent had nowhere to nourish itself, so he decided to try integrating it into the natal talisman.
To his surprise, the Immobilization Talisman—which was essentially a basic five-element talisman—actually proved compatible with it. Yet, viewed another way, no one would normally craft such a weak and deeply flawed Immobilization Talisman to serve as their natal talisman; cultivators almost always chose talismans with formidable offensive power.
Not only that, but Zhou Chuan had previously used the Fenji talisman infused with a Strange Flame and achieved unexpected results, so he added the Strange Flame into the mix when forging his natal talisman. While this should have been impossible, the core of Zhou Chuan's natal talisman happened to be lightning. Since lightning and fire are compatible, this addition endowed his natal talisman with yet another supreme treasure.
Chapter 118