The levels of creatures on the Polar Continent are divided into nine and twenty levels. The rank is used to assess the intelligence level of the creature or the ability to use magic and special abilities such as vitality, while the rank is to evaluate the physical destruction ability of the creature. Therefore, only creatures of high rank and rank can be called top-tier creatures.

Since the hierarchy only indicates the destructive power of a creature, the hierarchy is the evaluation of whether a creature belongs to the category of higher or lower organisms.

Among the ranks, except for the zero-tier represented by ordinary slimes, the first- and second-order creatures are low-level creatures. Basically, all first-order creatures only possess the most basic survival instincts, and a very small number of them have the ability to use magical power, which can be called low-level monsters. Taking slimes as an example, most of the slimes that have evolved special abilities, such as poison slimes and strawberry slimes, are all in the first order of monsters. It is worth mentioning that although the Frozen Slime and Snow Slime on the Frozen Snow Field are also special types of slimes, they are not first-order slimes, but are considered to be between zero-order slimes and first-order slimes. In addition, there are several special creatures that the cubs will also grow from only one order, and quickly move up the ranks as they grow, reaching the average level of the race in their youth, and most of these creatures are the most common ancient wurms.

Although second-order creatures are still classified as low-level creatures, most second-order creatures possess basic intelligence. And being able to solve problems and subjectively use one's own magic power is the biggest criterion for second-order creatures. Also taking the slime family as an example, when a slime evolves to become a slime king, it can be called a second-order creature. It is important to note here that King Slime does not mean a royal slime. King Slime is just an evolved form of a normal slime, with a much larger size and basic intelligence. Although King Slime can summon surrounding slimes, this summoning is actually very close to trapping, and the summoned low-level slimes will become nutrients or part of King Slime's body. This is contrary to the definition of a king-level creature possessing control and intelligence.

Although second-order creatures possess intelligence and can rely on subjective judgment to solve some problems, this intelligence is relatively low, and it cannot help them get out of the category of lower creatures.

Creatures above the third order are called medium creatures. It's a bit ridiculous, as a human being who defines the class of nine and twenty levels for different creatures. The hierarchical positioning of ordinary human beings is the third order that has just broken away from the category of lower creatures. Although the church has been propagating that it is the so-called "god" who has set the ninth order and twenty levels, as long as the mainland family with a little background basically knows that it was an extremely strong human being who customized this level classification at that time, and it is rumored that it has surpassed the ninth order and twenty levels of human beings, because the level of this human has exceeded the scope set by himself, so it is not impossible for the church to deify it.

As a third-order standard, ordinary humans can be called third-order creatures as long as they are adults. In order to reach the third-order level, slimes need to evolve again at the level of King Slime and become a slime kingdom or a king-level slime, such as the Divine Slime King spirit that the slime once devoured, before becoming a spirit, it belonged to a king-level slime. Possessing an intelligent process similar to that of a human, or being very good at manipulating magical powers, can be used as the judgment of third-order creatures.

Starting from the third-order creatures, the distinction between the third-, fourth, and fifth-order creatures is relatively small in terms of intelligence. Since human beings will be very different after cultivating magic or exercising, the third, fourth, and fifth order creatures are basically distinguished by the changes in the corresponding strength of human beings.

The definition of the fourth order is the possession of magical precision and magical power equivalent to that of a human who has been proficient in using magic for more than ten years. The definition of the fifth order is to be able to master magic skills extremely proficiently and be able to release large-scale magic of more than 100 meters.

Since human strength is used as the criterion for distinguishing, it is relatively difficult to distinguish between fourth- and fifth-order creatures. Therefore, at the beginning, when the Elder Tree Spirit distinguished Shi Leiyin's rank, he could only have a vague concept, thinking that he was between the fourth and fifth orders. The reason why the concept of evaluating monsters by human standards is too vague. Fortunately, unlike humans, most of the monsters' levels and levels are directly proportional, and the monsters between the third and fifth orders are almost between the eighth and twelfth levels in terms of level, so the wisdom monsters are more accustomed to using the level representing the destructive power in the third to fifth order to compare the difference in strength between the two sides. Of course, the ancient wurm, a creature that is extremely unbalanced in rank and level for ** reasons, is an exception.

Just as the third order is the decomposition line that distinguishes lower and medium organisms, the sixth order is also a dividing line between medium and higher organisms.

The definition of the Sixth Order is no longer based on humans, but on a high degree of magical affinity, or the equivalent of elemental spirits. The sixth-order standard removes the element of wisdom, which means that the intelligence of creatures above the sixth order can no longer have a decisive impact on the exertion of power, and magic affinity and elemental affinity have become crucial criteria. Shui Jing only had a fourth-order rank before evolving into a high-level water elemental elf, and under normal circumstances, the highest rank of an ordinary water spirit would be limited to the top of the fifth order due to its own situation. And when Shui Jing evolved into a high-level water elemental elf, although the level still only rose to the fifth order, as long as Shui Jing continued to grow, with the magic affinity of the high-level elemental elves, it was only a matter of time before he reached the sixth order, and even the seventh-order and eighth-order Cheng dù was not impossible. And the same is true for Jie Liya, who is currently only a third-order and is still at the bottom of a medium creature, all she needs is time to grow.

Shi Lei Yin had already stepped into the fifth-order process before entering the Frozen Lake Secret Realm, and because of his ability to devour the fusion slime, he had reached the top of the fifth-order in a very short period of time. But after that, Shi Leiyin had no sense of his own mastery of magic or the development of elemental affinity. Shi Leiyin, who had a rough understanding of the definition of rank, naturally knew that he had encountered the boundary of the biological level. For this, Shi Leiyin is actually mentally prepared, after all, his current body is only a slime, and the fifth order has already set a historical record for the highest level that a slime creature can reach. And in Shi Leiyin's opinion, he is not without hope of advancing again, with his own fusion of devouring slime characteristics, as long as he devours a sufficient number or a sufficient number of high-level creatures, after fusing the characteristics of the other party, there is naturally a way to advance to high-level creatures. However, it is difficult to find high-level creatures above the sixth order after all, and according to the situation that the level of monsters is usually proportional to the level of monsters, the minimum level of creatures above the sixth order must also be above the thirteenth level, and it is not the current Shi Leiyin who can be used as a hunting and devouring target for the time being.

And now, because Shi Leiyin has absorbed a large number of ice element crystals, although he has not been able to obtain a perfect ice element structure, his affinity for the ice element has increased explosively, and he has vaguely reached the requirements of sixth-order creatures for elemental affinity, which makes Shi Leiyin feel that he is about to be upgraded.