A normal universe experienced increasing entropy.
Entropy was a measure used to describe the degree of disorder in a system—such as a universe. In an isolated, closed system, entropy did not decrease but tended to increase. This was a universal natural trend.
For example, if a tidy, spotless room was left without anyone to clean or organize it, it would soon become filthy and messy: settled dust, dirty clothes tossed onto the bed, half-eaten snacks, open books, hair fallen on the floor, and so on. In technical terms, its "entropy"—its degree of disorder—had increased. To reduce entropy, extra energy had to be expended, such as human labor, to clean and organize the room again.
In other words, natural processes and cosmic evolution usually led to greater disorder and chaos.
Understanding increasing entropy helped one understand entropy reduction.
The universe's magic reduced entropy.
As Magic Power continuously gathered—meaning individual strength constantly grew stronger and individual will continually spread—the degree of disorder within the entire cosmic system steadily decreased, while order increased. Even purgatory possessed order. The order of chaos was still a kind of order, and order meant entropy reduction.
One obvious fact was that every 2D World in Su Shijun's Two-Dimensional Evolution Laboratory operated at its deepest level according to the logic of a certain will—or, more plainly, according to the thoughts of some great figure.
To use a somewhat inappropriate analogy, Magic Power existed in "unrestricted market competition," naturally evolving oligarchies and monopolies. The "oligarchs" who possessed powerful Magic Power played games and compromised with one another, constructing the fundamental rules by which the world operated.
These fundamental rules represented a decrease in disorder and an increase in order within the system.
That was entropy reduction.
In other words, the continuous and spontaneous aggregation of Magic Power onto a