(A Brief History of the Infinite World): The Infinite world is a fantastical world with natural law essence capable of making the most innocent of creatures into terrifying beings. Though this essence wasn't always like this.
Around 2000 years ago, the Infinite World looked extremely similar to earth with humans being the only hyper-intelligent species on the planet. Resources were vast and the population skyrocketed. With this came massive technological advances(including the their own version of the Industrial Revolution).
Then One day, a massive rift appeared above one of the major continents. With this rift in space came abundant change, among the many changes there existed elemental particles. Everything on the Infinite World, including the world itself, absorbed these partials causing them to inadvertently be strengthened to immense degrees. The humans coined process 'Assimilation', as your body would assimilate to the law particles and strengthen itself.
Humans were not the only one's to receive this sudden assimilation and in fact, on the Infinite World, the humans were among the weakest due to their bodies slow absorption of the law particles. The wildlife of the planet went through a terrifying change after the introduction of the law particles. Gazelles were now capable of running faster than the speed of sound, Pigeons were now the size of cars, and some sharks grew wings. These were just a few examples of how these animals changed. These beast's 'metamorphosis' was not the only thing that changed about them. There was now no restrictions on inter-species breeding!
This meant that a lion and a snake could have a baby and it'd produce a lion cub with venomous fangs and slits for eyes. Or a giant pigeon and a unicorn could have a baby that had a giant horse body the size of a small house and a beak. The more these creatures bred, the more powerful their offspring became. This rise in strength of these beasts became the downfall of most of the human population around the world. Over 95% of the world's human population was slaughtered by rampaging beasts! 7 out of the 8 continents on the planet were overran by beasts and the human population on these continents were all slaughtered.
The only continent able to fend off the beasts long enough to build a stable defense was the Cerulean Continent. Inside the continent, humans were able to build a massive wall that stretched tens of miles in the sky and wrapped around the continent's former capital city, Reinhart. This was a magnificent feat that people would talk about generations later.
Once Reinhart was established as the safe. Humanity began to strengthen themselves, explore outside the walls, research law particles, establish a new social hierarchy based on strength, and most of all... expand and conquer!
500 years after the initial establishment of Reinhart, human's research and the understanding of law particles expanded tremendously. These were the results of the research:
The first thing they advanced their knowledge in was law particles. Law particles were made up of different elements and these elements were ranked based off power and rarity. The less powerful a law was, the more common it was in the air and the more powerful a law was, the rarer it was. Element were categorized in one of four categories: Common, Variant, Supreme, Mythical.
Common: Fire, Earth, Wind, Water, Light, Dark
Variant: Lightning, Metal, Ice, Gas
Supreme: Life, Death, Space, Time, Fate, Chaos
Mythical: Aether, Luminaether
The next discovery was the existence of Neutral Essence or sometimes referred to as Spiritual Energy. This essence is the product of two opposing laws combining. What they discovered is that when one is absorbing essence, their bodies naturally seeks to combine opposing laws to create Neutral Essence. They found this to be true for anything capable of absorbing law particles. Neutral Essence was found to be the only form of essence capable of directly strengthening one's body. The more neutral essence one assimilated, the stronger they got. Although once you obtain a certain threshold on your assimilation, your capable of condensing your essence to create what was later termed 'Dantian'.
Once one formed a Dantian, they were capable of assimilating specific law essence into their Dantian, thus giving them elemental control over their assimilated law. One drawback to this though was that one could not assimilate more than one element in a single Dantian. Though, this limitation was solved when people started creating multiple Dantians, each with their own law. Although this method of training was much slower, it was worth it to some people. Just like how it wasn't to others who just wished to focus on a single law to assimilate.
Finally, a power system was established. It went as such:
Mortal(Warrior): 9 levels
Earth(Warrior): 9 levels
Sky(Warrior): 9 levels
Heaven(Warrior): 9 levels
Mortal(Knight): 9 levels
Earth(Knight): 9 levels
Sky(Knight): 9 levels
Heaven(Knight): 9 levels
Mortal(Saint): 9 levels
Earth(Saint): 9 levels
Sky(Saint): 9 levels
Heaven(Saint): 9 levels
Around 1000 years later humanity made it's most ground-breaking discovery yet. 'Blood Contract'! They found that they could use neutral essence as a bonding agent between a beast and a human, ultimately creating a connection that can only be broken by the one who initiated it. This brought a new profession into human society... Beast Taming!