After fusing with the Indestructible War God Body, Han Xuanji's cultivation directly ascended to the Eighth Revolution Grand Unity Golden Immortal, not far from the Ninth Revolution Great Overarching Golden Immortal.
The improvement was undeniably immense.
After successfully claiming the first reward, Han Xuanji turned his gaze to the other two rewards.
They were the True Martial Legacy and the remnant of chaos demon god.
The True Martial Legacy contained the Cultivation Techniques, secret arts, and Divine Abilities of the True Martial Emperor Lord, such as the True Martial demon suppression seal, True Martial Secret Arts, and True Martial Evil Dispelling Incantation... It was practically tailor-made to deal with the potential demonic calamity in the future.
The Legacy rewarded by the System even included the True Martial Emperor Sword and True Martial Divine Armor, two top-tier Grand Unity-level Magic Treasures that Jiang Hao obtained.
Among them, the most useful was the True Martial Secret Art, a combat secret art that Jiang Hao frequently used in the simulation. When unleashed, it could erupt with several times one's combat power, making it a top-tier combat-oriented secret art effective for Grand Unity Golden Immortals and even Hongyuan Great Luo Golden Immortals.
In just one month, Han Xuanji mastered many of the secret arts and Divine Abilities within the True Martial Legacy.
Subsequently, Han Xuanji focused on the final reward: the remnant of chaos demon god!
Just by its name, one could tell that this item was extraordinary.
Chaos Demon Gods, legendary terrifying beings born in the Chaos outside of Heaven, each possessed terrifying power, wandering through Chaos, constantly devouring living beings to grow stronger.
The infamous Demon Ancestor was rumored to be an extremely terrifying Chaos Demon God, who slaughtered countless Chaos Demon Gods to arrive in the Immortal Realm, intending to devour the Heavenly Dao and destroy the Immortal Realm.
The so-called Chaos Physique was not even worth mentioning in front of a Chaos Demon God!
Han Xuanji took out the reward from the System.
The remnant of chaos demon god rewarded by the System appeared to be only the heart of a Chaos Demon God.
Even though it had been Sealed by the System, it still exuded a chilling aura.
It was not actually an organ made of flesh and blood; its appearance merely resembled a heart. Its surface was pitch black, as if it could devour all light and perception.
Inside, countless intricate and complex patterns could be vaguely seen slowly circulating. These were the innate Dao imprints of the Chaos Demon God, containing the most primitive Dao Laws and serving as the Origin of power for this particular Chaos Demon God.
Even though this Chaos Demon God had perished countless years ago, its power was less than one percent of its Peak.
But just by gazing at it, Han Xuanji felt his heartbeat accelerate.
Jiang Hao defeated this remnant of chaos demon god in the simulation, but in reality, he only destroyed its outer shell. If this heart were recovered by the Demon Ancestor, it could still create a terrifying killing machine that would never betray and have no emotions.
Han Xuanji naturally did not intend to create a killing machine like the Demon Ancestor, but rather wanted to use this heart to enhance himself.
Other Grand Unity Cultivators would find it difficult to refine this item; the power contained within it was too terrifying. A slight mistake could lead to a backlash, or even assimilation by the residual will of the Chaos Demon God.
However, Han Xuanji possessed an already high-grade Chaos Physique, which had the potential to devour the remnant of chaos demon god. Coupled with numerous attributes, he was not worried about failure.
This was a rare opportunity for transformation, and he would not miss it.
Although the events in the simulation were not the true future.
Han Xuanji did not want that future to come true.
Humans are not plants; how can they be emotionless?
Ultimately, Han Xuanji was not emotionless like the Grand Pure One; he still developed feelings for everything around him.
If possible, he also wanted to twist the outcome and make the future unfold according to his will.
Han Xuanji took a deep breath, adjusting his state to its Peak.
His Eighth Revolution Grand Unity cultivation ran at full power, and vast Chaos Qi surged from within his body, seeming to transform into blazing flames.
Han Xuanji was cautious, and the Chaos Qi enveloped the Demon God heart.
"Om—!"
The moment the Chaos Qi touched the heart, the Chaos Demon God heart violently trembled, and a barbaric will filled with a desire to devour suddenly erupted!
It was as if an ancient Vicious Beast had been enraged, frantically assaulting Han Xuanji's restraints, attempting to devour everything of Han Xuanji in return.
The Chaos essence contained within this heart was of an extremely high grade and exceptionally exclusive.
"Suppress!"
Han Xuanji was already prepared; his blood and Qi roared, a firm belief integrated into it, and an indestructible golden radiance attached to it, resisting the erosion of that devouring will.
This was like a silent struggle.
He wanted to refine this core and absorb its most fundamental Chaos power, while the Demon God heart instinctively resisted, attempting to corrupt his essence.
Han Xuanji held his breath and concentrated, controlling it with all his might.
He did not attempt to directly obliterate the will within the heart; at least, he could not do so at present.
He was like the most skilled artisan, hammering it little by little, then guiding it to fuse with himself.
This process was extremely perilous and extremely slow.
Time slowly passed.
After an unknown period, the Demon God heart had shrunk by about one-tenth of its original size.
Meanwhile, Han Xuanji was undergoing an essential transformation.
The aura emanating from his body subtly revealed an indescribably ancient meaning, extremely heavy, as if it could crush stars.
Han Xuanji's understanding of the Chaos Dao advanced by leaps and bounds.
"Hoo..."
Han Xuanji slowly exhaled a turbid breath; he opened his eyes.
He had successfully refined a portion of the Chaos Demon God heart.
His cultivation had quietly broken through to the Ninth Revolution Great Overarching Golden Immortal, and his strength had surged!
The Hongyuan Great Luo Golden Immortal Realm was also getting closer and closer to him.
Not only his strength changed, but Han Xuanji could clearly feel that his Dao had become more perfect and more powerful.
"This item is indeed a supreme treasure!"
Han Xuanji looked at the Demon God heart, which had only shrunk a bit, feeling lingering fear but also the joy of his harvest.
He stored the remaining heart in the System space.
This item was enough to support his Cultivation for a long time in the future.
If he completely refined this Demon God heart, he would probably be able to step into the Primordial Chaos Realm.
Fusing with the War God Body, comprehending the True Martial Legacy, and initially refining the Heart of the Demon God... This simulation reward allowed Han Xuanji's strength to achieve a qualitative leap.
Han Xuanji got up, stretched, and then walked out of the quiet room.
When everyone saw Han Xuanji appear, they gathered around him.
Han Xuanji had been in seclusion for many years, always mysterious, so everyone was quite curious to see him this time.
"Master, have you broken through?"
"Did he break through, or did he comprehend a supreme Divine Ability?"
Facing everyone's questions, Han Xuanji smiled slightly and said:
"I've gained a little. Today, I will preach the Dao for you all."
This seclusion had taken him a full fifty years, consuming a lot of his mental energy.
With such a significant Breakthrough, Han Xuanji decided to celebrate and also guide those around him.
Han Xuanji decided to preach the Dao once more.
A Ninth Revolution Great Overarching Golden Immortal preaching the Dao was a rare event, even within the Great Luo Heaven.
Upon learning that Han Xuanji was going to preach the Dao, everyone in Myriad Phenomena Garden was overjoyed.
"Master is preaching the Dao? Is there such a good thing?"
"Senior Brother Han must have had a major Breakthrough."
Su Ming guessed.