With the Devil Master dead, Lin Fei had become the only person in the world who possessed the complete Heavenly Demon Inheritance.
As long as he made proper use of the authentic Heaven Swallowing Demonic Art, he could counter any cultivator or member of the Demon Race who practiced an incomplete version.
The only difficulty was that the gap between their cultivation realms could not be too great.
With Lin Fei's current cultivation at the Late Void Insight Realm, even with the authentic Heaven Swallowing Demonic Art, he could at most devour and refine Human Immortal Realm experts.
If his opponent was in the Earth Immortal Realm, the disparity in strength would be too great, and the art's countering effect would be greatly diminished.
The Gold-Devouring Insect King and the Gold-Eating Beetle Mother were both gu insects, unable to practice human spells or divine abilities.
The Nine-Headed Demon Saint and Long Aotian could practice it, but both were only in the Human Immortal Realm.
Even if they cultivated the authentic Heaven Swallowing Demonic Art, asking them to confront the Heavenly Baleful Protector, Earthly Baleful Protector, Blood Baleful Protector, and the others head-on would still be asking too much.
Only the Python-Sparrow Demon Patriarch, an expert at the Perfected Earth Immortal Realm, would do.
If he took action, he could suppress the Heavenly Baleful Protector, Earthly Baleful Protector, Blood Baleful Protector, and the others head-on.
Thus, if Lin Fei wanted to return to the Holy Demon Secret Realm, subduing the Python-Sparrow Demon Patriarch was the key.
Whoosh!
Lin Fei waved his hand, and the Seven-Treasure God-Suppressing Tower flew out.
He extended his divine sense into it and saw the Python-Sparrow Demon Patriarch's primordial spirit, which was suppressed on the lowest floor.
At the end of the battle, the Python-Sparrow Demon Patriarch