3600 years ago, there was an unborn genius in the Xiuzhen world, self-named Xuanyuan Zhenren, strong mana, no opponent, with strong strength, unified Xiuzhen Realm, since then all ethnic groups formed a Xiuzhen Alliance, elected Xuanyuan Zhenren as the leader of the alliance, and modified the calendar for the first year of the alliance calendar.

In the 23rd year of the alliance calendar, the alchemist Qian Yuanzi invented the Qi Ling Pill, using the most ordinary spirit grass with specific exercises to Qi Ling Du and the formation sealing spirit array to allow ordinary people to open the spirit root, and thus the national cultivation began.

In the 98th year of the alliance calendar, the blood demon ancestor of the Yuanying strong developed a bloodline cultivation system, using the bloodline of the spirit beast to transform the human race, so that the human race can obtain part of the ability of the spirit beast, the Xiuzhen Alliance established an alliance school in order to allow the whole people to better practice in this year, and the entire alliance ensures that any village must have an alliance school, and students are enrolled for free.

In the 100 years of the alliance, the Xiuzhen Alliance has stipulated that children who have reached the age of 6 must be enrolled in school, and students will be picked up and dropped off by the school to their doorstep, and parents only need to work and enjoy life with peace of mind.

In the year 2000, the low-level world Xuanyuan Continent began to conquer other worlds and plunder the origin of other worlds in order to upgrade Xuanyuan Continent and promote the growth of living beings in the entire continent. At this point, the battle of the worlds begins.

On September 1, 3600 of the alliance calendar, Mu Sheng came home from school in Lingya Village Alliance School, sat on the back of the Zhuji spirit beast earth rhinoceros that specially picked up students, and watched a contract carefully, today is the first day of Mu Sheng's school, the teacher talked about the history of the Xiuzhen Alliance in general, and each person sent a contract, only by signing the contract, the Xiuzhen Alliance will give students resources and education for free.

The earth rhinoceros has been domesticated by animal trainers, is very docile, walks smoothly and quickly, and arrives home in a short time.

After entering the house, Mu Sheng handed over the contract to his parents. The first thing to do after entering the school is to sign a contract, which is the tradition of the Xiuzhen Alliance, and the general content of the contract is that the Xiuzhen Alliance opens the spiritual root for the contractor for free, and provides training for the Xiuzhen system, but the contractor must serve the Xiuzhen Alliance after completing the study, and cannot fly to the immortal realm. If you want to gain something, you must pay a price, and the resources and exercises of the Xiuzhen Alliance cannot cultivate you in vain.

Father Mu Zhan looked at the contract handed over by his son, sighed and said, "Son, eat first, and after eating, our father and son will talk about signing the contract and what cultivation system you choose." ”

After dinner, the mother was cleaning up the dining table, and Mu Zhan called his son to the study and closed the door. Say to your son, "Find a place to sit down and we'll talk."

Mu Sheng casually found a stool to make it and looked at his father.

Mu Zhan pondered for a while and said, "Your great-grandfather used to be a great power to refine the body to reach the immortal realm, and the refining realm from low to high is divided into refining muscles, refining meat, refining blood, Refining bones, these four realms are collectively known as the refining realm, after these four realms are practiced, the physical body is constantly nourished by the aura, which can continue to increase the vitality and achieve the purpose of the immortality of the body, the next step is the cultivation of the fifth realm, the soul is integrated into every cell of the body, this step becomes the immortal realm, and when you reach this step, you can be reborn with blood, which is also the highest cultivation realm that our Xuanyuan world can accommodate. But your great-grandfather committed suicide 800 years ago. Hey......"

Mu Sheng was listening to the energetic sound, his great-grandfather turned out to be so good, but suddenly heard his father say that his great-grandfather committed suicide at the peak of his life, what is going on? There must be a hidden secret? So he hurriedly asked, "Father, why did great-grandfather commit suicide?"

Mu Zhan looked at his son and said slowly: "Because your great-grandfather was a perfectionist, he found that the warriors cultivated by the Xiuzhen Alliance now have only one purpose, and that is to promote the continuous upgrading of the Xuanyuan Continent, from a low-level world to an intermediate world, or even a high-level world. This process takes a very long time, so if the Xiuzhen Alliance wants to shorten the time, it needs the most efficient method, and now the training system of the Alliance is the most efficient institution for cultivating warriors, but it is not the strongest warrior, your great-grandfather used the military solution to reincarnate because he absorbed the soul energy of the alliance and caused his soul to be impure, so he could never become a powerful cultivator. ”

Mu Sheng asked suspiciously, "Absorbing soul energy will lead to impure souls? Can't you use the purification array to purify soul energy? Why can't you become the strongest cultivator if your soul is not pure?"

Mu Zhan explained Mu Sheng's confusion and said, "The soul of a cultivator is impure and cannot fit nature, so he cannot directly comprehend the laws of heaven and earth, and with the same strength, people with impure souls exert mana weaker than those with pure souls. Because the soul of the fifth realm of refining body has to be fused into every cell of the body, it requires a very large amount of soul energy, and if the soul energy is not enough, the soul will be annihilated and become a walking corpse. In order to quickly cultivate monks in the immortal realm, the alliance uses demonic beasts or kills monks from other worlds to purify the negative emotions and memories of the souls of the dead with a purification array, and turns it into the purest soul energy for the refiners who charge the fifth realm to use, because everyone's soul is different, so even if the purest soul energy is absorbed, the souls of different lives or different people are different, so the soul is not pure. ”

Mu Sheng tilted his head and thought for a while, "Dad, where is that great-grandfather now?"

Mu Zhan smiled bitterly and said, "I don't know, after the reincarnation of the military solution technique, you need to cultivate to the Yuanying realm to remember the memory of the seal in your previous life, and this universe is so big, your great-grandfather may have been reincarnated in other worlds." ”

Mu Sheng nodded and said, "Then, Dad, isn't it okay for the body refiner not to absorb the soul ability when he hits the fifth realm?"

Mu Zhan said: "First, this is a secret hidden by the Xiuzhen Alliance, and ordinary people don't know about it. Second, if you rely on your own soul cultivation, you may not be able to obtain the huge soul energy needed to impact the Fifth Realm until you die of old age. So if you don't aspire to become the strongest practitioner, absorbing soul energy is a good way to do it. ”

Mu Zhan asked with a straight face: "Mu Sheng, think about it now, do you want to become an ordinary immortal realm powerhouse, or do you want to become the strongest cultivator?" Go back to your bedroom, think about it tonight, and then give me the answer tomorrow morning." ”