Mu Sheng sent other gold, wood, water, and earth zombies in addition to the fire zombies, and went out to find a place with strong dead air, under normal circumstances, a group of ghosts will be born every period of time in a place with strong dead air, if Mu Sheng wants to study the symbiotic relationship between the land of death and the undead, he must figure out how the undead are born, grow, and die under natural conditions, this time is a long-term experiment, if it is not for Mu Sheng to cultivate the five elements of gold, wood, water, fire, and earth, it is impossible to complete this experiment.

It is important to know that only through long-term observation can we understand the birth, growth, and death of undead creatures, and this process contains methods for undead creatures to give back to the land of death, and only by understanding these methods can we fundamentally destroy the continuous growth of the land of the undead. And to observe for a long time in the land of death, if there is no Five Elements Zombie to help Mu Sheng resist the death qi, only Mu Sheng himself resists the death qi, and the time will be very short.

Maybe you want to say that when you can't resist, you can walk out of the land of death, rest, and come back after recovering your aura. That being said, but don't forget, this is the Huaxu world without any aura, and indeed, Mu Sheng has comprehended the complete law of the sun's true fire, and can absorb the sun's rays and transform them into aura, but this speed is very slow. In this way, the time between the two observations will be excluded from the time when Mu Sheng is in a hurry, resting, recovering his aura, and encountering other special circumstances, and the time between the two observations is too long, which is not conducive to Mu Sheng's experiment.

As for saying that it is possible to restore the aura through the spirit stone, so as to observe the coexistence and symbiosis of the undead and the land of death, this is also unrealistic. Reiki is positive attribute energy, and dead qi is negative attribute energy, and the reaction that occurs after the two meet is not only fast, but also violent. Just like the positive and negative electrons or the positive and negative poles of a magnet meet, the reaction is instantaneous, so fast that it is difficult for you to prevent it. In this case, no amount of spirit stones you have will be enough. Unless you have enough spirit stones to neutralize all the dead qi in the entire Land of the Dead, this is obviously impossible, and if you have this ability, you don't need Mu Sheng to come here to do experiments and find a way to crack the way of the Land of the Dead.

The Five Elements Zombies have provided a huge help for Mu Sheng to experiment in the Land of the Dead, and the zombies are inherently undead, making it easier for them to find a place where ghosts are born in the Land of the Dead, and the undead have a strong sensitivity to the death gas. For example, if you hide a few pieces of meat and bones at home, and then ask Erha to look for them, with the dog's strong sense of smell, you will soon be able to smell the smell of meat and bones and find the place where you hide the meat and bones. This is the same reason that Mu Sheng asked the Five Elements Zombie to find the birthplace of the ghost, and of course he would definitely leave a zombie to help him resist the death qi.

Under the deliberate search of the four zombies at the peak of the primordial infancy, they soon found a place full of death. Mu Sheng was led by zombies to the place of dead air, and these gray-white dead gases coalesced together in concentrations visible to the naked eye, forming patches of gray-white air masses similar to mist.

Mu Sheng took out several corpses of the five elements spirit beasts of gold, wood, water, fire, and earth that had been prepared long ago from the storage bag, as well as the corpses of some ordinary animals. Throwing these corpses into the rich dead qi, in addition to the corpses of ordinary animals that began to absorb the dead qi immediately, the corpses of the other five element spirit beasts also absorbed the dead qi at the hour of their respective attributes according to the law of meridian flow injection.

Although it is lifeless, it also takes 100 days to form zombies. The corpses thrown out of this experiment are all the corpses of low-level spirit beasts, and after forming zombies, all of them are the same as their strength before they were alive. For example, the corpse of a spirit beast in the late stage of qi training, after forming a zombie in this place where the qi is full of dead qi, it immediately has the strength of the late stage of qi training. And the zombies cultivated in the Supervision Hall, regardless of their strength before their death, were all in the early stage of Qi training when they first transformed into zombies, and it seems that the main reason is that the concentration of dead qi in the Supervision Hall is not enough.

Ordering the Five Elements Zombies to kill these zombies who had just transformed, Mu Sheng used the power of his soul to observe that when these zombies died, most of the dead qi in his body would be lost, and only a small part of the dead qi disappeared. Sure enough, as Mu Sheng guessed, flesh and blood also contain some positive energy, and these disappearing dead qi are neutralized with the positive energy in the flesh and blood, and those dead qi that has not been neutralized will overflow into the space after the zombie dies.

As for why the Five Elements Zombies killed these experimental zombies, there is also a reason, if Mu Shengsheng uses spells to kill, it is positive energy, which will destroy the balance of the dead gas, and let the Five Elements Zombies shoot, using the dead energy, which is negative energy, and will not destroy the balance of the dead gas, which is more conducive to the authenticity of the test results.

If there is no nourishment of flesh and blood, the strength of zombies will not increase, but they can continue to swallow dead air, and the process of zombies swallowing dead qi is the process of refining dead qi, which can continuously improve the quality of dead qi. This is also the reason why the death qi here is so strong, in addition to the resentment and anger generated by killing living creatures can form death qi, what else can form death qi and increase the total amount of dead qi? This is the problem that Mu Sheng is most concerned about at present.

On the 360th day of coming to the land of death, 3 ghosts were born, and these ghosts had the strength of the early stage of refining at the beginning of their birth, and they were ordered by Mu Sheng to follow these newly born ghosts by the three zombies of gold, water, and earth. On the one hand, these Five Elements Zombies with the peak strength of the Yuan Infant are not only strong, but also comprehend the complete system of laws, and their IQ is also very high, so it is the most suitable person for them to conduct tracking tests and observations.

Mu Sheng only needs to perform the concentric technique once on a regular basis to understand what the three zombies of gold, water, and earth observe. One of the three ghosts born was an earth-type ghost that absorbed the earth's qi, and this ghost was quickly starved to death, because the vitality of the soil here had long been drained, leaving only pure dead qi. There is also a water-type zombie, there is no water source at all in the place of death, and naturally it is also starved to death, and only one fire-type ghost survived.

Mu Sheng found that after the death of these ghosts, all the dead qi in their bodies flowed into the land of death, and did not consume the dead qi. In this way, the results of Mu Sheng's experiment have also been obtained, the coexistence relationship between undead creatures and the land of death is similar to the coexistence relationship between creatures and the world space, both of which are purified through cultivation to improve the energy level, but after the natural death of the creature, the dissipated soul power will increase the total amount of aura, but the undead will not increase the total amount of dead qi, is it true that death qi can only be produced by the death of living beings?

Retreating to the very edge of the Land of the Dead, Mu Sheng took out the spirit beast that had been prepared long ago from the spirit beast bag, and Mu Sheng planned to start the most important experiment of this trip to the Land of the Dead.