Abyssal Lord of the Magi World

From each Apocalyptic Star that formed the constellation inside their bodies, a pillar of blood vitality and Astral Origin emerged and gathered between the Elemental Chaos Heart and Bloodline Heart. 

The first, second, and third Apocalyptic Stars were only responsible for fueling the Infinity Heart creation. The Yang Apocalyptic Star and Yin Apocalyptic Star were the ones responsible for giving its structure and forming the matrix of the divine artifact. 

Yin and yang, negative and positive, electron and proton. The infinite duality gave birth to the five elements, the celestial bodies, and the fundamental aspect of all matter.

Each Neo-Demon must use that infinite duality that resided now inside their bodies thanks to the Apocalyptic Stars sealed in their hearts and brains to form the Infinity Heart.

Yin-Yang particles gathered around the Elemental Chaos Heart and Bloodline Heart, arranging themselves autonomously, following patterns engraved in the True Doomsday Body by the Absolute Unity Omega Law.

The patterns the yin-yang particles formed were so majestic and complex that even Peak Rank 9 Magic Creators or Runemasters would be amazed by them. 

Even the Incarnation of Death and Destruction and the baernaloths considered the creation of the Infinity Heart a significant achievement.

Not only would the Infinity Heart allow the sealing of the following four Apocalyptic Stars, but it also opened the gate for the True Doomsday Body Path of Power to Rank 7 and immortality!

Hours passed, and as torrents of Astral Origin and vitality gathered between the Elemental Chaos Heart and Bloodline Heart, the figure of a new dark golden heart began to appear.

By the time these dark golden hearts stabilized themselves inside Zatiel and Ezequiel, both Neo-Demons resembled mummified corpses. 

Daybreak withstood the drain on his vitality due to his incredible regeneration abilities and control over his life force.

Invictus's life remained strong thanks to his impressive physique, control over his inner force, and granular influence over his bodily functions. 

Awe filled their souls when they perceived the Infinity Hearts inside their bodies. Still, they knew something was missing, as the divine artifact remained as a mass of Astral Origin, yin-yang particles, and vitality. 

To finish the formation of the Infinity Heart, they needed to add a catalyzer. Something that could defy the rules of the Prima Universe and allow the True Doomsday Body to have the same potential as the Path of Power granted by the Universe Will.

They were both exhausted and had difficulty breathing, but still, they looked toward the gargantuan construction above them and focused on the first level before releasing one last roar.

"ROAR!"

"ROAR!"

When Invictus and Daybreak's roared, the Champion of the Universe woke up from his meditation. 

Even though his eyes were closed, there was nothing that could escape from this man's perception. He saw the weak force that managed to reach all the way to his level and touched the ceiling.

Despite all the things he had seen and all the cataclysmic fights he participated in his life, what happened next made this man feel surprised for the first time in eons.

The ceiling of the Final Purgatory's second floor glowed when a giant magic matrix manifested itself. Its size was immense and drew unbelievable amounts of energy from the billions of statues inside the purgatory.

The Champion of the Universe detected how this formation acted on the creature inside the first level and then saw how two dark red particles smaller than atoms appeared in the center of the ceiling.

An immense shock that almost made him open his eyes assaulted the Champion of the Universe when he saw those particles.

Thanks to his knowledge and wisdom, he knew that those particles' origin came from a physical body even stronger than a Primarch Dawn Titan. 

"RANK 10!" The Champion of the Universe's voice trembled when he spoke those words, but there was no other way to explain that power. 

The formation in the ceiling turned off once the particles emerged, and then the two dark red drops descended, leaving the second floor under the NRAI's surveillance.

In less than a minute, the dark red particles left the Final Purgatory. One entered Invictus' chest while the other went into Daybreak.

Zatiel and Ezequiel felt the particles fusing into their dark golden hearts unleashing chain reactions, transforming them from a construct of energy into something physical. 

"¡AHHHHH!"

"¡AHHHHH!"

Even with the help of their Moon Shatterer True Wills, the pain that assaulted the Neo-Demons was so great that they could not help but scream in agony and fell into the Will Forging Sea.

It did not take long for the Infinity Heart to fully materialize after the dark red particle fused in it, giving birth to a dark golden heart covered in azure and crimson patterns.

Inside the Infinity Heart, there was an immense amount of empty space with nothing but a dark red particle in the center.

Unfortunately for the Neo-Demons, the pain remained even after the Infinity Heart finished its formation, as blood vessels emerged from this new organ and expanded through their bodies, connecting with every piece of flesh.

These new blood vessels were dark golden as well, and although they were highly dense, they were also very flexible, and there was not a single part of the body they did not reach. 

Every centimeter of growth took around an hour. It was only after three days that the process finished, and the Infinity Hearts now were intermingled with the Neo-Demons' bodies at a cellular level.

While the pain ceased after completing the blood vessels formation, the Infinity Heart just now began to work. All the Astral Origin that each Apocalyptic Star generated began to converge into the dark golden heart.

The Infinity Heart had three main functions: Storage, reconstruction, and fighting mode.

It was now fulfilling the storage function, replacing the Apocalyptic Stars as the centers of Astral Origin. 

In less than a minute, all the Astral Origin inside the Neo-Demons gathered inside their Infinity Hearts, where it revolved around the dark red particles. 

A qualitative change occurred in the Astral Origin, becoming denser while at the same time more organized and effective. 

From now on, the Astral Origin would not emerge from each Apocalyptic Star independently. It will all organize inside the Infinity Heart, from where it could reach every piece of the body through the dark golden blood vessels in a more efficient way.

"¡BOOM!"

"¡BOOM!"

Heartbeats, so powerful that resembled explosions, reverberated through the Will Forging Sea as both Neo-Demons rose from the ocean amidst mighty storms.