Seeing the Ancient Demon Gate flung wide open in the void, Divine Lord Tiande's expression finally eased somewhat.
Everyone knew that during their last trip to the Earth Immortal Realm, Penglai had obtained a core cultivation art, the Nethersea Spirit Codex. Yet it was ultimately a cultivation technique; after merely one or two hundred years, Penglai had seen no tangible results from it.
But Penglai's expeditions into the Earth Immortal Realm had not yielded meager gains every time.
This Ancient Demon Luosheng Spirit Codex had been obtained from the Earth Immortal Realm fifteen hundred years ago.
By cultivating this method, one could use essence blood as a medium, vengeful souls as a guide, and summon an ancient demon upon oneself, enhancing both strength and fleshly body. With this formidable form, he and Nine Infants had once forcibly slain a Spirit Transformation cultivator in the Heavenly Gate territory of opponents from another Cultivation World.
His two-headed, four-armed Ancient Demon Incarnation had been cultivated through this very art.
Most powerful of all was the Spirit Codex's core divine ability—the Ancient Demon Luosheng Gate.
It used tens of millions of living beings in a blood sacrifice, drawing souls as a guide to truly summon ancient demons from the Ancient Demon Realm.
The deceptive formation he had laid down earlier had been for the blood sacrifice and soul-guiding ritual within his cave heaven.
Naturally, this method carried risks. According to its records, one moment of carelessness could open the Ancient Demon Gate and allow ancient demons to invade this realm.
But at this moment, how could he afford to care about any of that? If he did not summon an ancient demon, he himself would die here.
The only pity was that he had not had much time to prepare. He had merely deployed