In other words, bloodlines that had not reached a certain level simply could not be transformed into spirit blood.
The texts stated that the bloodline used to perform the technique had to belong to at least a Great Demon of the Early Transformation Stage, and preferably one with even the faintest trace of a Primordial bloodline.
When Xu Yi had read that passage, he had thought it was sheer fantasy. A Great Demon of the Illusionary Form Stage was probably beyond anything he could afford to provoke.
Great Demons of the Transformation Stage were simply the stuff of legend.
So he had paid no attention to the Three Venerables Blood Transmutation Secret Art.
But after finishing both texts, Xu Yi had discovered in alarm that this was the only secret art that met his requirements.
With no other choice, he read the entire Three Venerables Blood Transmutation Secret Art again, only to slap his forehead when he had made it halfway through.
He suddenly realized that he had been looking for the donkey while riding it. If the secret art required a high-grade bloodline, he refused to believe there was anything in the world more precious and pure than the blood in the bowl he had obtained from the Sabertooth Tiger and stored in his Sumeru Ring.
That beast had truly been born in the primordial wilderness. Even the lowest-grade demon beast carried the purest Primordial bloodline in its veins.
Once he realized this, Xu Yi's blood nearly boiled with excitement. That was why he had hurriedly decided to leave Donghua Immortal Sect and seek an opportunity to fulfill the requirements of the Three Venerables Blood Transmutation Secret Art.
The Three Venerables Blood Transmutation Secret Art required Dragon Tiger Pills, Immortal Crane Grass, and Xichanzi as ingredients, and a Kunyu