The Nine Revolutions Buddha-Devil Art was not of a particularly high grade, merely high-grade Earth-tier.
At most, it could cultivate Gu Yi's physical body to the ninth level of the Profound Martial Realm.
After all, it was not the true Three Lives Scripture, only a fragment of it—or rather, an introduction. Naturally, its grade would not be very high.
Yet even so, it was still Gu Yi's most powerful cultivation art and martial skill at present, a notch stronger than the Roar of the Mad Lion.
The Nine Revolutions Buddha-Devil Art—through nine revolutions of Buddha and Devil, one could enter devilhood from buddhahood, or turn from devilhood to buddhahood. Buddha and Devil were one.
When the cultivation art circulated, Buddha Demon Power flowed throughout the body in endless cycles, forming the momentum of a heavenly circuit that endlessly strengthened the physical body.
At the Spirit Martial Realm, each additional hundred strands of Nine Revolutions Buddha-Devil Power, achieved through continuous heavenly cycles, signified the completion of one major cycle and was called one revolution.
These hundred strands of Buddha Demon Power were equivalent to one level of the Spirit Martial Realm.
With one hundred strands of Nine Revolutions Buddha-Devil Power, the tempered physical body could withstand and directly endure the attacks of ordinary first-level Spirit Martial Realm experts;
With two hundred strands of Nine Revolutions Buddha-Devil Power, one could withstand attacks from the second level of the Spirit Martial Realm, and so on.
Once the Nine Revolutions Buddha-Devil Power reached one thousand, it was equivalent to the Profound Martial Realm.
At that point, only each additional thousand strands of Nine Revolutions Buddha-Devil Power signified the completion of one major cycle, raising the physical body by one realm.
Gu Yi's body had previously been tempered by pills refined from Immortal Herbs and