[Evolution of World] is a natural phenomenon when a normal world without any mana tries to evolve into a Magical world with mana.
Naturally, mana can't grow out of thin air if the world has none, to begin with.
If it is a Magical World that has mana already then the world will replenish its mana from time to time but in the case of Earth, It had none.
[Evolution of World] is a very difficult, long, and dangerous process.
Dangerous not only to its Inhabitants but also threatens the very existence of the world.
During this process, the world without mana tries to connect to the 'Exiled Prison Realm'.
Exiled Prison- As the name suggests, It is a prison for heinous criminals that comprises many Magical beings and races.
It was made with the help of many [Immortals] that got bored of living for eternity and decided to create a Realm exclusive for criminals. These [Immortals] had their own goals...
Some wanted to have a collection of Magical beings for their tests and experiments,
Some were bored so decided to act like Heroes for fun visiting world after world collecting criminals like Pokemons and...
Some young [Immortals] who were naive and immature thought this was the right thing to do(naturally all these youngsters change after living thousands of years and understand the difference between when you are young and hot-blooded and when you are old and wise).
Noah was Familiar with the 'Exiled Prison Realm'. In fact, when he was born he was shocked that Earth decided to go through the process of [Evolution of World].
A world decides to go through this process only if it is sure of its doom.
It means the world doesn't have enough resources to support its inhabitant.
Overpopulation, Pollution, Natural Disasters, Extinction of many species, or the Domination of a single one are a few causes that lead the world to take drastic measures to establish a connection with other worlds and Evolve.
No World willingly establishes a connection with other worlds or realms.
Even if a world tries to establish a connection with others, they are refused almost immediately except 'Exiled Prison Realm'.
'Exiled Prison Realm'- A lawless Realm.
During the process of [Evolution of World], Several Teleportation portals are created from many worlds in the 'Exiled Prison Realm' to the world asking for help.
It is a One-way portal through which inhabitants of the world that is asking for help can enter the other world and gather Magical resources freely plus the natural mana in the worlds of 'Exiled Prison Realm' slowly assimilates itself in the new world...
But-
It has severe drawbacks!
First of all these portals are One-way for a short period of time and Magical beings from another world can freely exit and do as they please after a certain amount of time passes.
This happens because of the instability of the portals that are single-handedly created by 'Exiled Prison Realm'.
When the world asking for help notices such anomaly, It reports back to the 'Exiled Prison Realm' and asks it to close that particular portal but it takes time and in the meantime, disasters can occur.
Even after the 'Exiled Prison Realm' closes the portal, a threat remains that must be neutralized by the inhabitants of the world.
Hence this process is very dangerous and only used as a last resort by the world.
Noah who was sitting in the Imperial library laughed heartily reading the History books naming the process of [Evolution of World] as 'Deliverance Of Divine Goddess'.
"A lowly God takes credit for natural phenomena created due to the boredom of my fellow brethren.....hahaha" Noah muttered to himself and laughed again.
As someone who has lived countless years, Noah knows the ins and outs of most of the things in the entire Cosmos hence he can easily deduce the sequence of events of a goddess manipulating a small number of people to spread the word that this natural phenomenon is caused by her to gain more Faithful followers.
"Anyways, It is fun to explore 'Exiled Prison Realm' from time to time. Since it never stagnates as many new worlds' are created in that realm by many immortals for their experiments....hmm. I guess I visited it over 50000 years ago... "
As Noah was reminiscing about his previous visit to the 'Exiled Prison Real', With a loud 'thud' sound the doors of the Imperial library opened.
"Brother! You are late for my sword practice and you are still reading books in the Imperial library?! Humph! No no no I won't forgive you this time! There will be punishment and you will have to accept it!"
An annoyed voice came from the entrance of the Imperial library which brought a smile to Noah's face.
He kept the book on the shelf and turned around to see a beautiful young girl about 17 years old. She was Ares, Noah's twin sister.
Her allure and exotic charms reached a new level in the history of women on the entire Earth.
She was 1.75 meters tall. She had long exotic pink hair which she got from her mother and red eyes which she got from her father and paired with a perfect c-cup bosom and perky butt.
She was wearing a white crop top and black leggings that accentuated her soft curves with white shoes. She was the definition of a succubus.
Right now she was holding an elegant sword and pointing it at Noah as if she was about to murder him.
Seeing the cute annoyed look on her face Noah raised his arms in defeat and smiled wryly "Okay! Okay! I am guilty, I will accept whatever punishment you give as long as you don't go overboard! For now, let's go to the training arena."
Ares squinted her eyes in suspicion and asked "Are you sure?"
"As long as you don't go overboard" replied Noah nonchalantly.
The annoyed look on Ares' face was quickly replaced with a bright smile "Alright! but don't forget about the punishment."
She giggled happily and started walking in the direction of the training arena.
Noah nodded and followed her but became incredibly suspicious when he saw that playful smile on Ares' face.
Noah has lived for countless years, although he is in the body of 17 years old, he still has the experience of many many years that can't be trifled with and he immediately realized that Ares was up to no good again.
Shaking his head he decided to ignore it.
'She is probably planning something mischievous again' Noah thought but for now, training his sister comes first.
[Evolution of World]! I wanted to add dungeons and also a Mc that knows a lot about the Universe... So I had to go through this way to explain the workings of Dungeon which a powerful [Immortal] Mc like Noah should also know about.
A phenomena that can't be explained by strongest existences of the Universe sounds ridiculous... cuz monsters and teleportation portals connecting two worlds can't grow out of thin air.
Have some idea about my story? Comment it and let me know.