In the beginning, Yanan was just a small town in the middle of nowhere, and even the people of Yanan have forgotten where this place came from, and the historical documents about this small city are only kept in Yanan's only academic institution, Byron Weiss College.

In fact, Yanan's geographical location was originally the center of the ancient country called "Sumerian civilization", but the Sumerian civilization has long disappeared in the long river of history, and only the occasional excavation of ancient tombs in the Sumerian era can give a glimpse of the glory of this ancient civilization.

Byron Weiss College has developed a keen interest in the ancient Sumerian civilization excavated, and as more and more ancient tombs have been excavated, scholars have found that the ancient tombs contain many incomprehensible knowledge, such as "ancient gods", "beast plagues", "superiors", "eyes", "beyond thinking", and so on.

They speculate that the ancient Sumerians once coexisted with an exotic life known as the "Old Gods" and created a highly brilliant civilization, only to be abruptly destroyed by some mysterious force.

As a result, Byron Weiss set off a research boom on Sumerian civilization, and the leader of the research was the dean of Byron Weiss College, Master William.

They organized expeditions to explore the tombs of the Sumerian civilization, and although they encountered terrifying monsters that had never been seen before, they also gave birth to countless shocking archaeological discoveries.

It is recorded in the Sumerian literature that by acquiring the "inner eye", that is, the "spiritual vision", it is possible to raise the level of human thinking, evolve to the level of "ancient gods", obtain knowledge beyond human beings, and see phenomena beyond human horizons, so as to achieve human evolution.

It has been recorded that the "inner eye" is present in the human brain, and the greater the number, the higher the level of thinking.

However, Master William had no clue how to obtain the "Inner Eye" until the unearthing of the Great Holy Grail of Izzy.

This strange thing is sealed in the center of a vast labyrinth, with a strange appearance and no rules.

In research, it has been shown to be an active object, and if a person's blood is contained in it, the Holy Grail will release eggs into the blood, and if the blood is ingested again, the "Inner Eye" can be obtained.

Master William, the dean, infused this "blessed blood" with the help of his proud disciple Lawrence, and in just a few days, the aged Master William felt that his insight had become sharpened and his mental state had also improved rapidly, as if there were many eyes observing the world at the same time.

This result made Byron Weiss College excited, and this blood began to be called "Blood of the Old Gods", and the "Inner Eye" was renamed "Vision".

The study found that the continuous infusion of the blood of the ancient gods would continue to increase the magnitude of spiritual vision, so the academy began a large-scale blood transfusion experiment under the leadership of Master William.

More students gained spiritual vision, so the study of Sumerian civilization soon ushered in faster development.

However, the side effects of blood transfusions also quickly became apparent.

Blood transfusion researchers show varying degrees of blood dependence, and will continue to increase the dose to increase their spiritual vision.

For human beings, the improvement of spiritual vision is not endless, after a certain limit, the human brain will go crazy because it cannot withstand the huge amount of information, and the excess spiritual vision will even appear on the human body in the form of eyeballs.

Master William found that many wriggling eyeballs had grown on his forehead, which made him tremble.

Finally, Byron Weiss had his first case of death by blood transfusion, a student who violated the rules and committed suicide in a violent manner by transfusing a large amount of blood for a long time.

After dissecting it, it was found that the student's head was full of compound eyes, like a fly, and the true face of these eyes was actually a special parasite, which perceived the outside world and then transmitted the perceived information to the human brain, which is the true face of spiritual vision.

The vigilant Master William covered his eyes with a huge hat, because he no longer needed to see the world with his eyes.

Subsequently, Master William ordered a ban on blood transfusion experiments in order to put an end to this act of suicide. However, this move caused protests from his student Lawrence and many of the students who had become dependent on the blood of the Old Gods.

Because research has shown that humans are not incapable of controlling a large number of psionic visions, but they just need something called the "eye cord". As the name suggests, this thing is the rope that connects the brain to the eye.

Lawrence believes that the dependence and rage caused by blood transfusions are only a side effect of the stage, as long as the "eye search" is found, everything will be solved, and the experiment cannot be interrupted because of temporary setbacks.

In response, Master William gave a public lecture in which he found that the "cord of the eye" is called the "third umbilical cord" in Sumerian texts because it is the physiological structure carried by the ancient gods when they were born.

The ancient gods have three umbilical cords, the first one links the god and the mother, the second connects the will of the god and the universe, and the third connects the brain and the inner eye.

It is true that humans can harness a large amount of spiritual vision through the "Rope of the Eye", or the "Third Umbilical Cord", but the Third Umbilical Cord can only be obtained by killing the newborn Old Gods, which is tantamount to a fantasy.

As a result, Byron Weiss terminated the blood transfusion experiment, and "fear the blood of the old gods" became the admonition of this school.

However, an explicit ban is not the same as a complete ban.

Byron Weiss was still studying the Sumerian tombs, and a large number of addicted students were still making blood privately, drawing from the bodies of students who had already been transfused with blood, and looking for high-quality blood source objects.

It is speculated that the bloodline of this high-quality blood-derived object should be closer to that of the ancient Sumerians, or even to the ancient gods.

Lawrence continued to explore the Sumerian tombs with great ambition, and he discovered a new area called "Loren City" around the original "Izzy" tomb complex, which was the city of Sumerian civilization that was destroyed by the "Beast Plague".

Here, Lawrence discovers a substance called "Orton's Blood", which, according to the literature, is a true ancient god who receives Orton's blood and will give birth to a god son in the blessed womb at the right time.

In other words, the third umbilical cord that Lawrence dreams of can be obtained in this way.

As a result, Lawrence said goodbye to Master William with Orton's blood, and the two parted ways due to a conflict of ideas, and some scholars followed Lawrence away, and they founded an organization called the "Healing Church".

Using the blood of Orton to cure incurable diseases, Lawrence led the Healing Church to promote the technique of blood healing in Yanan, on the one hand, to continue to expand the influence of the Healing Church, and on the other hand, to find the right time for the birth of Orton's son in this world, so as to seize the third umbilical cord.