《Spirit》 A being composed of a soul, similar to yet distinct from a ghost. The difference is that a Spirit possesses its own physical body and can be viewed as a unique race. Each one is at least A-rank.

《Conceptual Spirit》 Among Spirits, there are those who are the embodiment of a 'concept.' These are Conceptual Spirits. They are extremely rare, and since most are classified as 'S-rank or Unmeasurable,' their existence is kept secret. Some are known to gather and live together like a family.

《Ranks》 F -> E -> D -> C -> B -> A -> S -> Unmeasurable (F-rank is slightly above average human physical ability, while S-rank is a top-tier powerhouse guaranteed at a national level. There can be significant gaps even within the same rank, and this disparity grows wider at higher ranks. In the Unmeasurable category, the difference in ability and power can be overwhelming.)

Worldview Abilities usually stem from 'Cursed Energy,' while magic stems from 'Mana.'

First, let's look at Mana and Cursed Energy. Mana and Cursed Energy form a 'Core' in the shape of a small sphere located near the heart. There are pathways called Mana Veins and Cursed Veins that run parallel to blood vessels. When these pathways are activated, one can manipulate Mana or Cursed Energy, marking the beginning of an ability user.

While the pathways follow the same direction and location, they are distinct from blood vessels. The dangerous act of forcibly channeling Mana or Cursed Energy through blood vessels—which have the best circulation efficiency—is called 'Synchronization.' For a typical ability user, even 5% synchronization is difficult to handle, leading to mana backflow or ability side effects, yet the momentary power gained is beyond imagination. Nevertheless, since synchronization often claims lives without warning, most people never even attempt it.

Fundamentally, this world is a multi-dimensional, higher-dimensional realm where large and small dimensions are gathered within a massive encompassing dimension.

Among these are empty or extremely small dimensions, which are key to 'Dimensional Expansion.'

Dimensional Expansion is a technique acquired by finding such a dimension and selecting one that best fits one's ability to claim ownership. It is an extremely high-level technique that many high-ranking users do not possess.

The principle involves aligning the coordinates of the owned dimension with the current dimension to create a rift, then pulling oneself and the target into that rift to move to the owned dimension. In reality, it simply looks like two people have vanished.