Mythical Pokemon Master!

The little ghost man was absolutely furious, but it knew that Libo would not let it prance around as it liked. It turned to Chojusen and said "You! What do you want? I'll give you anything you want as long as I can have my snack!"

Chojusen asked "You only want the flames?"

"Yes! The snack is the most precious!" To this little demon, perhaps nothing would be as delicious as Nihility Flames that came directly from an Omega Dao.

Chojusen threw over his Nihility Flame and watched it get consumed by the little ghost man. It looked like it was in pure ecstasy as it savored in the flame's taste. The ghost man's actions were amusing to Chojusen as he could create an infinite supply of Nihility flames. He wondered how the Marshadow would react when it saw him whip out a boat load of nihility flames.

As the Marshadow savored in its treat, Chojusen flew over to Libo and asked him what that ghost man was. Libo said "Oh him? He's just a dumb dumb, Chaos Primordial. Dawei found him a couple million chaos cycles ago, and since he's an Autarch of Nihility, the dumb dumb followed him everywhere."

"Chaos… Primordial?"

"They are one of the strongest beings born of the Chaosverse's prime essences. However, they are supremely dumb. I mean, you saw how it called your flames a "snack," right?"

Libo looked at the ghost man that was still expressing nothing but pure joy and said "You know! If you follow my friend here, I bet you could eat all the treats you wanted!" He turned to Chojusen, winked, and said "Isn't that right?"

Chojusen took the hint and created another, larger, mass of nihility flames. He said "Right~"

The Marshadow stopped its frivolous savoring of the nihility flames it had already consumed and look on at Chojusen with the passion and fervor of a trillion battle hardened immortal cultivators. It struggled to put together a complete sentence as it said "You… you ha-ave m-m-mo-re treeeeeeats?!"

Chojusen was impressed with the dedication the Marshadow had towards his Nihility flames. He said "Yes?"

"If… if I swear… will you give me all the treats that I want?" The little ghost man was a Chaos Primordial, it was one of the most supreme beings in the entire Chaosverse. Only Autarchs could bother it and even then, they couldn't even kill it. So it did what Chaos Primordials loved to do most; search for food. Now that a practitioner of the Omega Nihility Dao appeared, it would do anything and everything to get a chance at eating the Omega Nihility flames; there simply wasn't anything more delicious than these flames to this Primordial.

Autarch Dawei might be a Nihility Autarch, but the flames of the Omega Dao were better/more delicious than ANY Dao; including an Autarch's.

Libo looked at the dumb dumb Primordial with astonishment. Swear? A Chaos Primordial making a lifeblood oath? That would be a fun story to tell~

"Um, Yes?"

"I, Primordial Marshadow, due solemnly swear on my very life that as long as I get all the treats from… eh… what's your name?"

Chojusen was still stunned from the reveal that it actually called itself Marshadow. He thought the system was just calling it by a reference… He woke up from his stupor and answered "Chojusen Akimichi."

"...from Chojusen Akimichi, I will serve him as a faithful companion! Should I ever fall through on my promise, may my Dao vanish and my life perish!"

[Hidden Mission Complete!

Hidden Mission: Tame a Chaos Primordial.✔

Bonus: Tame a Chaos Primordial as a Daolord.✔

Bonus: Tame a Chaos Primordial as a World God.✔

Bonus: Tame a Chaos Primordial as an Ancestral Immortal.✔

Reward: 5 Billion Shop Points after accounting for bonus]

"Wow, it actually recited a halfway decent Lifeblood oath. This dumb dumb, must be just a smidgen smarter than the other Primordials." Libo still had trouble comprehending the situation. Was it really that easy to tame a Chaos Primordial? Obviously not, else his brother for life, Dawei, would have tamed it much earlier on.

"Master! Master! Give me that large treat now!" Marshadow was now allowed to rush over to Chojusen's side and interact with him, since it would no longer be a threat after being bound by the lifeblood oath.

Lifeblood oaths were an essential and versatile tools that the cultivators of this plane used. Right now Marshadow created one to be bound to Chojusen in exchange for his infinite supply of treats. Chojusen had agreed to the lifeblood oath, so he was also bound by its demands as well. Should either he or Marshadow fail to follow through with the contract, the one he went against their word would see their Dao vanish and consequently die immediately.

Even before this incident, Chojusen had come across a lifeblood oath before. Back when he was deciphering Autarch Dawei's Stone Tablet, he had sworn a lifeblood oath to not divulge out the secret techniques or Nihility Dao of the Autarch.

Chojusen put on a little show and created a cap; just like the one from the Pocket Monsters show. He flipped the cap backwards and created a "pokeball" with his Creation Dao. Inside the pokeball, he created an isolated space with his Space Dao and a living environment with his five elements Dao and Time Dao. Marshadow watched all this with confusion. Just what did its new master want to accomplish?

Chojusen then put the flames of nihility, which by now were the size of an ocean, into the pokeballs internal space. With an overtly gestured animation, Chojusen threw the ball at Marshadow, and willed for it to enter the space inside. Then, purely for his and the system's amusement, he made the pokeball roll from side to side with a blinking red light at its mid point.

Eventually, he stopped willing the ball to cradle from side to side and put the ball in one of the pockets of his pants. Even the system chipped in on the fun.

[Congratulation! Host has caught the mythical pokemon Marshadow!

...

This isn't a mission and I already gave you a reward, so stop looking at me like that...]

With this little episode cleared out of the way, Chojusen went back aboard Libo's ship and the Autarch resumed the ship's progress. The amount of nihility fire within the ball housing Marshadow would last the little demon quite awhile, so the journey continued with some semblance of normality.

Chojusen once again split up into his various Dao avatars and continued striving to study and fuse Supreme Daos of the World God level. As his avatars did this, his main body was once again cast towards the hell called the Daoheart technique. Learning more about the various Daos and rising them up to the Supreme, Fused Supreme, and even Omega Level did wonders for his Daoheart, but Chojusen could only be content with perfection. Only when he reached the complete mastery over the seven levels of the Daoheart technique would he be content with his Dao Heart's strength.

…

More and more time passed, and eventually, the excitement of cultivation slowly dimed somewhat for Kaguya. She had grown to the point of having developed a truly supreme Spacetime Dao. Alas, she wanted to take a break. Along with Chojusen, they had spent over five years on the Autarch's ship.

Now she wanted to take a break, so she called Chojusen over and told him about her wish. Chojusen's main body had also grown "tired" of the abuse and pain, training with the Daoheart technique brought him, so he was more than happy to comply.

Libo had been waiting for this moment as he was less than interested in cultivating alongside either Chojusen or Kaguya. His cultivation sessions were befitting of his power as an Autarch. Imagine, Chojusen was just at the Ancestral Immortal level, but he was training for decades before he could see any results. As an Autarch, his cultivation sessions could very well take thousands of chaos cycles before he saw even an iota of improvement.

Now that these two were taking a break, he could show off his ship's other recreation areas and finally have some fun again. From special environments like hot springs and canyons, to technological locales, the Autarch's ship was filled with everything. One day Chojusen and Kaguya might be visiting a sublime hot spring, while the next day they might watch a movie within the Autarch's theater.

There were several independent realms within the ship; like the pool area that had its own sky, sun, and moon. Everywhere Chojusen, Kaguya, and Libo went, they would have some a ton of fun. However, even when Chojusen wasn't training… he was training. Chojusen would often cook on these relaxing days, which improved his Dao of Cooking. Even at night, when they were suppose to be sleeping, the Dao of Dual Cultivation would be also be… cultivated….

Chojusen could remember the first night after he merged back with his Dual Cultivation avatar. That avatar had been studying the Dao of Dual Cultivation from other cultivators with no one to practice with; it had amassed a terrifying amount of insights, but nowhere to try them out. Now that the main body went on vacation with Kaguya, it was time to reap what he sowed and the Dao of Dual Cultivation was no joke!

Apart from the obvious benefits that Dao brought, it also brought many more that Chojusen and Kaguya both delighted in discovering. The Dao of Dual Cultivation facilitated their ability to connect on a much more fundamental level. Thus, all the partners that trained this Dao with Chojusen would become the Yin to his Yang, and in a fight, their combine effort would utterly ruin those well above them in terms of cultivation.

Then there was also the pleasure cultivating this Dao brought. It simply can't be explained how amazing cultivating this Dao was for those involved. Calling it just "sex" would detract from how great it truly was. It was so influential to Chojusen that he dared to say he understood what love truly was after he started to cultivate the Dao with Kaguya.