[Gatekeeper]: The person who guards the 'black hole universe', also known as the 'order manager'

Grading of Gatekeepers: Trainee Gatekeeper, Formal Gatekeeper, Sage, Great Sage.

Gatekeepers will die and be reborn an infinite number of times after saving their memories, and all gatekeepers in the 'Black Hole Universe' will abide by the "Nine Rules" at the same time.

[Nine Rules]: The order that all gatekeepers of the Black Hole Universe must follow, written by the original five Great Sages.

[Open Space]: A form of spatial authority in the current universe in which the civilization in the universe is located.

Biological civilizations in the 'open space' can either 'actively' or 'passively' come into contact with other civilizations in the universe.

[Enclosed Space]: Another form of spatial authority in the current universe in which the civilization in the universe is located.

Biological civilizations in the 'enclosed space' are 'isolated' separately and cannot come into contact with any biological civilization in the same universe or in a different universe.

[Interstellar Authority]: The privilege of the biological race with the 'intelligent civilization' to survive in the universe.

Specifically, it includes: the development of one's own civilization, the exploration of other civilizations, the exploration of the universe, and the teaching of other knowledge or civilizations that are not one's own civilization.

[Space jumping]: refers to the method of entering from one 'black hole universe' to another 'black hole universe'.

The usual paths are 'black hole gates' and 'wormholes'.

[Black Hole Universe]: Refers to the universe formed by 'black holes'.

It is the cradle of the formation of all civilizations. The form is presented as a 'matryoshka doll'.

[Black Hole Gate]: Enter the entrance to the 'Black Hole Universe'. The exit is 'White Hole'.

[Last Universe]: The outermost layer of all 'black hole universes'.

This universe is a place where lower creatures live, and there are few resources in space, but it is the most 'peaceful' compared to other black hole universes.

[Inner Universe]: A 'black hole universe' other than the 'last universe'.

The more the 'inner universe' possesses, the more advanced the energy and civilization wisdom is.

[Parallel Universe]: A 'backup of civilization' created by a higher intelligent civilization using the 'idle' cosmic space.

[A Black Hole Year]: The method used by gatekeepers to calculate cosmic time, the time of a black hole year is about 1.4 billion years of Earth time.

[Giant Beast Clan]: A beast clan, generally huge in size, with intelligence.

In the beginning, he lived with humans, ate them to almost destruction, and was later transferred from the planet where humans live to another planet by the gatekeepers.

[Dinosaur Clan]: A genetic monster created during the heyday of human civilization.

After it was uncontrolled, human beings used 'nuclear energy' to exterminate it, but at the same time, human beings themselves were affected by 'nuclear radiation' and almost destroyed.

[Ghost Race]: The product of the 'genetic experiment' during the heyday of human civilization is the 'branch' of human beings.

Most of the ghost races have the same or different images as humans, and due to the alteration of some genes, they have obtained superpowers and advanced wisdom that are different from humans, and at the same time, due to genetic mutations, they have suffered from some diseases of different humans.

[Human Gene Seed Bank]: A place created by gatekeepers to observe why human beings have 'evolutionary stagnation'.

It stores the genetic sequences, civilizations, history, knowledge, technology, and memories of human beings in various periods.

[Moon]: A small 'human gene pool' synthesized by Red Moon using the Earth debris and space meteorites produced after the 'First Human Earth Civilization'.

After the 'Southern Barrier' was damaged, it was used to protect the earth.

[Southern Barrier]: After the 'enclosed space' where humans are located is damaged, the gap that appears is filled by the gatekeeper to form a 'door' that can be opened and closed.

The portkeys were originally managed by the Red Moon.

[Miniature Planet]: When life is born on a planet in the black hole universe, a miniature version of the planet that is exactly the same as the planet will appear in the hands of the 'Great Sage' for the Great Sage's observation of life.

[Wheel of Time]: A tool used by gatekeepers to record the passage of time.

[Mirror of Truth]: The 'Demon Mirror' in the hands of the Great Sage can see the essence of all things.

[Traverser]: A 'tool' used by the Great Sage to 'interfere' with the civilization of the planet.

Traversers are divided into two types according to their duties: communicators and changers.

[Time Travel]: The method used by the timetraveler to travel through time.

The point in time traversed is the 'past' or 'future' of the current point in time.

[Traveling through space]: A method used by planetary civilizations to carry out 'interstellar travel', 'colonization', or construction of 'parallel universes' within the same universe.

The path through space is to use 'wormholes' and 'dark matter'.

[Wormhole]: A space shortcut within the same universe that can shorten the straight-line distance between stars.

[Dark matter]: The existence opposite of the 'matter' in the universe, which is the 'energy fuel' commonly used by advanced civilizations.

[Candle]: It is one of the tools used by some advanced intelligent civilizations for 'storage'.

The function is similar to that of a human 'book', and the earliest candles that appeared in human civilization were based on their shapes.

(*The above nouns are explanations of the nouns that appear in the book, and are different from the nouns that exist in reality.) ）