In this world, the strength of creatures is simply divided into:
Low-level demons are those below Rank 6 transcendents by human classification.
Middle-level demons are those above Rank 6 transcendents and up to Rank 7.
High-level demons are those above Rank 8 legends and below Rank 10 creatures.
Super-level demons are akin to the existence of True Gods and beyond.
As for fierce beasts, it goes without saying that the beasts of the mortal world are just slightly stronger than wild animals.
As for exotic beasts, they are also demons; it's just that different places have different names for them.
Beyond that, in this world, there are a few inexplicable entities that cannot be explained by common sense. These mysterious beings have power systems different from those of the Totem Masters of this world. According to the book, they are a type of conceptual existence and their combat style is similar to causality, making them very difficult to deal with.