The King in Yellow made sure to be at peak condition before traveling to the Eldritch Universe's nucleus.
Unlike the one in the Prima Universe, a natural cosmic formation protected the Eldritch Universe's nucleus. It was so strong that no one beneath Extreme Rank 9 could get anywhere near it, and even those at that level would find it hard to cross it.
Phantoms of all sorts of Eldritch powerhouses impregnated the cosmic formation, distorting reality. Luckily for the King in Yellow, he controlled the Karmic Space-Time Omega Law and understood the Law of Cause and Law of Effect, allowing him to see the path through it.
It was not easy, but the King in Yellow managed to enter the Eldritch Universe's nucleus, and what he saw in it shocked him to the core. There was nothing in it but two mini-universes containing white orbs with incredible power.
The Eldritch Universe's nucleus contained the fundamental forces that allowed the existence of everything, and the King in Yellow knew as soon as he perceived those white orbs that they were Cores of Existence.
Learning that the origin of your entire universe was two Cores of Existence of an ancient mighty life form would astound anyone, but the King in Yellow overcame the shock in a matter of seconds.
The only thing that mattered to the King in Yellow after learning the highest secret of the Eldritch Universe was that in those Cores of Existence, he felt a force that could allow him to push his cultivation forward.
The King in Yellow took his time and carefully analyzed everything before choosing what mini-universe he would enter. One orb contained energy capable of flooding an entire super universe, while the other had a cosmic force that could easily rewrite the fabric of reality.
Choosing to tackle the Energy Core of Existence would mean a battle of pure raw power. While the King in Yellow was confident in his brute strength, there was no way he would underestimate an opponent that came from a life form above the Law Realm.
Facing the Omega Law Core of Existence would be a battle of skill that no Eldritch should be able to win due to the inherent limitations of their law comprehension.
However, it was precisely that type of battle of skill the one the King in Yellow preferred the most. Without a second thought, he entered the mini-universe that contained the Omega Law Core of Existence.
Unlike the Cores of Existence in the Prima Universe, these two did not have Champions, as the Great Old Ones took that role and the gifts those warriors would gain.
As soon as the King in Yellow entered the mini-universe, the Omega Law Core of Existence reacted, generating waves of gray force that filled the dimension with threads.
The King in Yellow saw billions of those threads emerging from his body and soul and vanishing into the distance. He had just adapted to the change when the threads paralyzed him and began to pull, trying to rip his existence to pieces.
An agony like no other assaulted the King in Yellow. Nevertheless, despite the pain, he did not lose focus and understood the power the Omega Law Core of Existence was using against him.
Just like he expected, the Omega Law Core of Existence used the Force of Karmic Causality and attempted to rip him to pieces by inverting cause and effect.
If the King in Yellow sought to overcome the threads using brute force, he would fail without a doubt, but that was never his plan. While paralyzed, he still managed to fight back.
Using his understanding of the Law of Cause and the Law of Effect, the King in Yellow countered some of the Force of Karmic Causality's power before infusing in those gray threads a yellow force.
There was no power in the Eldritch Universe that could counter the cosmic force in the Omega Law Core of Existence, but the King in Yellow used something whose basis came from a different universe.
Using the Karmic Space-Time Omega Law, the King in Yellow began to fight back against the Omega Law Core of Existence. Using space-time to fight against causality was an excellent strategy, as both were forces that planted the basis for reality.
Yellow and gray auras clashed again and again inside the network that covered the entire mini-universe, and the one that managed to overcome the other would come up victorious.
The battle lasted years, with neither the King in Yellow nor the Omega Law Core of Existence moving. Every second was torture for the first, but all that suffering paid up as he won!
In the end, the yellow aura covered the entire mini-universe, and the one covered in threads and paralyzed was the Omega Law Core of Existence.
After winning that battle and making sure his opponent could not fight back, the first thing the King in Yellow did was fall to the ground. He was beyond exhausted, and despite not having moved a muscle, this was the most dangerous battle of his entire life.
Five days later, the King in Yellow regained enough power to take care of the Omega Law Core of Existence. It did not take him long to find a way to use it safely since he understood its essence during the fight.
A Fourth Evolution Extreme Rank 9 life form could use a True Rank 10's Core of Existence to access Fourth Realm's aura. That was a power like no other and could allow those that followed the Law Path to evolve their Omega Laws into Truths.
Theoretically, someone who took the Concept Path could use it to obtain an Eternal Flame, but since no one had tried it before, it was impossible to know for sure.
Luckily for the King in Yellow, he did not have to consume everything. Even if he did not care about anyone else, the Omega Law Core of Existence was one of the Eldritch Universe's pillars, and losing it could generate an apocalypse.
The King in Yellow did not hurry up things, and he slowly consumed the Omega Law Core of Exisntece's essence over the course of ten thousand years, making sure nothing would affect his ego and mind.
Power was important, but there was no point in it if he lost himself to obtain it.
Once the King in Yellow obtained the Infinity Truth, he used part of his power to stabilize the Omega Law Core of Existence's shell and returned to the Eldritch Universe's nucleus.
The King in Yellow stared at the other Core of Existence but immediately refused the idea of using it. Not only would that condemn the Eldritch Universe, but he did not believe he could devour two of Endless Darkness' Cores of existence without some severe repercussions.
With his De-Facto Rank 10 battle power, not only did the King in Yellow no longer fear the Great Old Ones, but now he could look down on them.
Instead of waiting for those monsters to wake up from their slumber, he traveled to the Old World, forced his way into R'lyeh Void, and attacked the Great Old Ones by surprise.
The King in Yellow crippled the cultivation of all the Great Old Ones at Extreme Rank 9, pushing them back to Late Rank 9. As for Azathoth, he lobotomized this one, creating a puppet only he could command.
That is the saga of the tiny black larva that rose from nothing to the absolute overlord of the Eldritch Universe.
