The skeletal part was completed almost four weeks after Shrayin and the others left the Frozen Lake Secret Realm. The next muscle part took more time than Shi Lei Yin expected.

In addition to the influence of external factors, the complete lack of understanding of the muscle part is the biggest reason for the time beyond Shi Leiyin's prediction.

Originally, in Shi Leiyin's opinion, after completing the most important bone part, as long as the muscle is attached to the bone, it is considered complete. But when it came time to actually start doing it, Shi Leiyin realized that he was wrong. Although the muscles formed by using a slime** can be easily attached to the bone, the bones are bones and the muscles are muscles, and there is no coordination between the two at all. If Shi Leiyin wanted to move his body, he had to command that part of his bones and muscles to move at the same speed and frequency. This is simply an instinctive action that can be done with a single thought, and it is forcibly turned into a coordinated action that requires a high degree of concentration. It's just a simple action.

And if you give up the muscle composition and directly use the slime body to become a humanoid cover, the result is only a little bit. From the need for double coordination to the movement of the bones in the body driven by the slime's body, to put it bluntly, it is basically the same as when the bones were not established before. The only difference is that the bones provide better support when standing, reducing the amount of physical effort required to maintain the height of the humanoid.

Shi Leiyin was naturally not satisfied with this benefit, but although he knew in his heart that the problem of the muscle part might be in the tendon, that is, the part where the muscle attaches to the fixed point of the bone. But without professional knowledge, Shi Leiyin can't solve this problem by himself. Because bones and muscles are subjectively constituted, Slime's ability to fully grasp the body affects Shi Leiyin's composition of the body - bones, which should be driven by muscles.

In the case that he could not solve the problem by himself, Shi Leiyin could only turn to the outside world for help. Shui Jing Sanxiao can't help at all, although Zilde also has some muscle-related knowledge, but after all, he only knows how to use muscles to compress bones or use joint techniques to compress tendons to cause pain.

There were no human corpses on the tundra for Shi Leiyin to study, so Shi Leiyin could only focus on the animals that lived in the tundra and snowfield. Initially, it went well, and Shi Leiyin obtained a relatively complete tendon composition from the first few mammals he caught, and perfected the attachment of muscles and bones through experiments. However, after that, the way to move and control the bones through the muscles still took a lot of Shi Leiyin's time, after all, animals are just animals, and studying the muscle patterns of animals can only obtain the animal's action patterns, and it is not of much help to the human skeleton that walks upright.

The obstacles encountered in the physical composition caused Shi Leiyin's research psychology, originally as a lazy person, when encountering troublesome problems, Shi Leiyin preferred to abandon them or find ways to avoid them. Occasionally, however, Shi Leiyin will also appear to be a researcher, although often the things he explores are not beneficial to his life at all. After being reborn, because of the relationship between slime instincts, Shi Leiyin's laziness has developed to the extreme, even if he wants to study the fusion devouring ability many times, he just observes it carefully when he thinks about it, and when there are other things, he forgets about it.

But now, Shi Leiyin has studied the basic composition of the human body, and this is the first time he has appeared in this state since he was reborn. Despite the need to travel and the need to take care of three children, Shi Leiyin still spends most of his free time in the day researching. In this state, Shi Leiyin is incredibly diligent. Not only do they take out some of the animal's limbs for observation and study when they are resting, but they also take the initiative to hunt fresh materials from time to time. In addition, they deliberately do not clean up the blood stains of creatures that are hunted as material, so as to attract predators to come and become their new material targets.

This situation lasted for nearly a month, and when Sanxiao began to be unable to stand the smell of blood that Shi Leiyin made himself all over every day, the status quo was finally terminated under the combination of internal and external factors. On the day of the breakthrough in Shi Leiyin's research, a dragon is attracted by the smell of blood in Shi Leiyin's material and becomes Shi Leiyin's new companion on their travels—a deadly companion.

Because of the pursuit of the dragon, Shi Leiyin had to conduct research on the body structure while escaping, which greatly reduced the speed of the research, until three days ago, after entering the Eastern Mountain Range, Shi Leiyin relied on the steep terrain of the Eastern Mountain Range to get rid of the desperate pursuit of the Dragon who didn't know why, and at the same time, he also completed the last part of the muscle attachment research, and successfully formed his own humanoid body.

Because the bones themselves are not completely identical to humans, Shi Leiyin has made corresponding changes while studying muscle attachment. Especially for the parts of the limbs and the chest, which have relatively large bone changes, Shi Leiyin did not refer to any animal samples, but independently established the corresponding muscle system through the experience gained. So that the joints of the limbs can not only be completely at any angle, but also can be used indiscriminately. As for the chest part, anyway, the power movement of the arm does not need to rely on the assistance of the pectoral muscles at all, and Shi Leiyin simply ignored that part of the muscles and directly replaced them with a slime body with better cushioning performance. In Shi Leiyin's opinion, anyway, he usually has to act in a cloak and coat, and it is enough to have flexible limbs, and if the body parts need to be exposed, then there is nothing to hide about his identity.

After the muscle part was completed, it only took ten minutes for the skin or something, in fact, Shi Leiyin just put a thin layer of slime body on the attached muscle part, and then controlled this layer of body to change into a human skin color.

An additional point to mention is that there is no gender on Shi Leiyin's new body. In his own thoughts, he planned to add male characteristics, but firstly, this body in general, the slime is not a real human, and secondly, the third child doesn't know why he pays special attention to this, and after thinking about it for a long time, Shi Leiyin still gave up the first gender trait.

Shi Leiyin's completed human form is about the same height as before he was reborn, about 1.7 meters, and his body is a little thinner, because of the addition of extra muscle parts, although he is thin, it is only the difference between being fat and strong.

In terms of head, Shi Leiyin did not use either bones or muscles, but directly chose to control the slime's body, mimicking a human head. Because he can't remember his previous appearance clearly, the new face shape and appearance are similar to Mr. Wolf's. Shi Leiyin reluctantly made some modifications to what he remembered to be, making himself look like a young man of twenty-seven or eighteen. It's just that this head is changed from a slime after all.,Although there's nothing wrong with a rough look.,But if you keep staring at it carefully.,It's still a little strange.。 Shi Leiyin knew that this was because there were no anomalies caused by skulls and facial muscles, but anyway, he had been wearing a hood when he was in the human world, so this abnormality should not cause any trouble.

After completely completing the human form, Shi Leiyin began to train to quickly switch between the slime form and the human form. And force yourself to maintain your human form in normal times. Although Slime has always believed that he has become accustomed to the appearance of slimes, and feels that the human form is far less comfortable and convenient to move than the slime form, subconsciously, he still wishes that he can be like a human.