Seeing the Ancient Demon portal in the void swing wide open, Divine Lord Tiande's eyes finally eased a little.
Everyone knew that last time in the Earth Immortal Realm, they of Penglai had obtained the core cultivation method, the Nether Sea Spirit Canon, but that method was, in the end, a cultivation art. In a mere one or two hundred years, Penglai could not see much effect from it.
But one had to know, each time Penglai entered the Earth Immortal Realm, it was not as if their gains were always meager.
This Ancient Demon Rashomon Spirit Canon had been obtained in the Earth Immortal Realm fifteen hundred years ago.
By cultivating this kind of art, one could use essence blood as the medium, resentful souls as the lure, and have an ancient demon descend upon one's body, raising one's strength and fleshly body. In that ferocious state, he and Nine Infants had once, in the Heavenly Watchtower lands of an opponent from another cultivation realm, forcibly slain a Spirit Transformation.
His two-headed, four-armed Ancient Demon Incarnation had been cultivated from this very method.
And the most formidable part was the core divine ability of this spirit canon, the Ancient Demon Rashomon Gate.
That used tens of millions of living beings, blood sacrifices, and soul lures to truly summon an ancient demon from the Ancient Demon Realm.
Just now, his deliberately laid maze formation had been for the sake of the blood sacrifice and soul lure inside his Grotto-Heaven.
Of course, this method also carried risks. According to what was written above, the slightest carelessness would open the gate of the ancient demons and allow ancient demons to invade this realm.
But at this moment, how could he still care about so much? If he did not summon an ancient