Ye Zhen had only ever read about Dao Heart Demonic Talismans in ancient texts before this. He had never seen an actual one.
After a martial artist's cultivation broke through into the Dao Entry Realm, Soul Oaths no longer held much binding power. A Soul Oath used the martial artist's own Soul Power as its trigger—how could it possibly offer much restraint?
Under normal circumstances, only martial artists who had condensed a Yuan Spirit could use the power of their Yuan Spirits to invoke the Heaven and Earth Laws and swear an oath that carried considerable binding force.
Yet even then, there were still many loopholes, such as true bodies and false bodies.
Then there were the Demon Race, who invoked their Ancestral Spirit Bloodlines to swear oaths, and the followers of the Heaven Temple and Demon God Palace, who swore by the Divine Lords and Divine Kings they worshipped, and so on.
But while these methods imposed a certain degree of restraint upon the oath-taker, none of them offered absolute restraint.
As for the matter of the Jade Slip Spirit Projection, it was a dead knot for the Heaven Temple. No oath, however venomous, could put the Heaven Temple at ease.
Thus, the Heaven Temple had brought out this Dao Heart Demonic Talisman.
These Dao Heart Demonic Talismans were created by those whose cultivation had entered the Dao Realm, or even reached its middle and later stages. They used their own vital blood as a catalyst, invoked the Heaven and Earth Laws, and refined them with a secret art for nine days and nine nights before finally forming a Dao Heart Demonic Talisman.
After using a Dao Heart Demonic Talisman, the user would employ a secret art to simultaneously invoke their Innate Soul and the talisman, then swear something