Just in case someone doesn't read the description.

Disclaimer: I'm no expert nor a pro in writing, mistakes will happen, and English is not my first language. I accept input, advice, and people pointing out my mistakes. I will listen to what you have to say and try my best to learn from your input unless they're weird. Writing is not a job for me, it's a hobby and probably a way to earn a little amount of pocket money. I know this won't become popular nor do I have any faith for it to blow up since this is my first time writing an original story. If you do not like the story then don't stay, I won't ask you to stay nor will I force you, not that I can do that anyways. Just enjoy and hate it if you want, like it if you want. Just whatever. A story is a story. It's from my imagination, not for your liking, ok maybe that was too harsh, but you get the jest of it. For updates again this is not a job, it's a hobby and for pocket money at best, so I will probably update every week or every two weeks or at most a month, it won't be consistent since I'll be more focused on my studies, it's not like I'll live out of writing. Now sit down or lay down or stand up, ah whatever I just hope you enjoy this humble story I will deliver.

Notes: The story will switch between first person POVs and Third person POVs, I don't know if you like it that way, but it's easier for me to write like this.

I won't be adding power systems in this series since I find the idea of someone's strength being numbered is weird and complex, however I can't say the same about items. Items such as armors, weapons, magic, grimoires, runes, etc will have their ranks.

The world known as Tri Regna contained three separate realms. These three realms had no prior knowledge of one another's existence until one day, when a total of six ancient temples were discovered, two of which were located in each of the realms.

The first location is the realm of the Underworld.

People who lived in the underworld were born of fire and blood, born to be warriors, born to fight, quick with their wits and quick to adapt to new situations. These people inhabited the underworld, the moment they took their first breath in the underworld, their destinies were decided for them. They were born to battle, born to survive, and born to be resilient and powerful. Their lifespans are limited to the time before they perish in combat.

The inhabitants of the underworld have facial characteristics similar to those of humans; however, they stand out from humans by possessing horns and having paler skin than humans do.

They are particularly skilled in destructive forms of magic and in dark forms of magic. Black magic is something that practitioners in all three realms are aware of, but this does not mean that all three realms accept its practice.

The underworld is composed of a total of seven different factions, each of which possesses a distinct form of ancestral magic.

The Sky Tearer faction is known for its hellfire-based magical abilities.

The Dark Order faction is known for its barrier-creating magic.

The Embassy of Darkness faction is known for its Necromancy magic.

The Red Sun faction is known for its Blood Magic.

The Dark Souls faction is known for its Shadow Magic.

The Nameless faction is known for its Poison Magic.

The Seven Sins faction is known for its Sin Magic.

Once upon a time, millions of years ago, the seven factions of the underworld came to an agreement that there would be no large-scale wars in the underworld unless the following conditions were met:

There is a plot afoot by a faction or an organization to commit genocide against one or more other factions.

There are a number of groups from various factions that are working toward the eradication of the underworld or overthrowing the current order.

At least one group is attempting to tap into the ancestral magic of another group.

The inhabitants of at least one village belonging to the opposing faction are slaughtered on a large scale by one or more factions.

There have been a few skirmishes here and there, but the underworld has not sustained any significant damage. Because the inhabitants of the underworld do not enjoy civil wars, they make an effort to respect one another.

At the close of each year at the time of winter solstice, the seven clan elders get together for a meeting at the same time as always.

The current leaders are:

The Sky Tearer faction: Eren Erebus

The Dark Order faction: Ezra

The Embassy of Darkness faction: Raizel

The Red Sun faction: Sandra Paragon

The Dark Souls faction: Char Tassatar

The Nameless faction: Lumine Lance

The Seven Sins faction: Azrail Revenant

Primordials are the name given to the population's earliest known ancestors. They are people who are of the very first generation of people to settle there. Sadly, over the course of the years, their population has shrunk, and they now number somewhere in the neighborhood of a few dozen. These several dozen were then divided into two separate groups.

The God Killers, led by Blanc Marwood, consists of twelve members, and The World Eaters, led by Vlad Omega, consists of eighteen members. The two have been competing against one another for centuries.

The dark spirits are the natural adversary of the underworld. They are able to conjure various monstrous creatures and are extremely hostile toward people of different races. Additionally, there are a great number of cursed beasts roaming the underworld.

Within this sphere, sorcery of any kind, including black magic, is regarded on an equal footing.

Because there is a plentiful supply of materials in the underworld, their technological advancement in the military is very advanced. Sadly, the underworld only has five water fountains in each faction, while the primordials have three fountains in each of their own groups to call their own.

The underworld is a large plane with no seas, just land, mountains, and lava.