One man one Cow, roaming the meadow. Just like a boss, Izana sat on top of the cow.

"UMMOOO, we've already ran around for 1 week! and the guide has done! why is the vow not yet ended!"

While the cow grumbling, Izana thinking...

'It seems that this meadow placed in the middle of some ocean, or is it a lake?... while the water doesn't seems to have any salt, the the size's too big... I've hovered around for 20 meter from the ground but I still haven't see any land... Is the nature world doesn't have a salt water, or is it really just a lake?...'

"UMMO!! Izana-sama, let's just end it... I miss my wives mooo..."

While still contemplating about the question, the cow's complaint get in Izana's ear...

"That's right! A village! alright tenderloin steak let's go to your village and let me meet with your chief!"

"UMOOOO, no don't I'll be killed by father if he found me guiding an intruder!"

"Chose, be killed or be food..."

"UMMMO!!" *rush *rush*

By the threat he feels, the Cow running like mad, running so fast like a horse. With it's life as the threat, The cow Ushiwakamura found himself, running with a threat in his back...

~~~

*Bam!* *Whooosh!*

*bababababam* *rush*

Barrage of punch raining on Izana, and barrage of nature power magic showered him. Right now, in the middle of Arena Izana battling against a minotaur . A bull headed human, in the myth...

With a punch that miss the target just a little off, The taurus continuously punch Izana, with a slight margin, Izana keep evade it, no longer punching the minotaur say. 

"Hahaha! Human! You really Weak! you've only had this much of power with you?!"

"You damn taurus! I'll show you the meaning of muscle strength to you!"

With that, Izana took a 'one-two' boxing stance. hopping in the ring like a bunny, and jump really fast almost like an instance. 

*Bang!*

However, the minotaur get ready in a defense stance. He block Izana's one two, but still get himself thrown away several step.

"Human! you are really strong!"

"Hahah! you too taurus! now! let's end this fight!"

"Don't belittle me Human! I'll let you see the power of our Ushi Nature animal!"

"Don't have a big head animal! at most you're just a bull! not long you'll just be a livestock! Haha!"

*BAM!* *STRIKE* *SLIDE* *BOOM*

"Ummmo!, why did this become like this! mooo"

To answer that we need to come back several days before..."

~~~

"How long will it take?"

"Wait until I finish eating UMMOO"

"Hey... I'm have yet to eat in this week, and you dare to make me wait for you to eat?..."

"UMMO!! Izana-sama is a monster that does not need to eat different from a little animal like ummo!"

"Even if you say that... I am still 4 years old, damnit... I should really make you a Tenderloin steak..."

"UMMOO! I've done! Let's go Izana-sama!"

Say Tenderlo.. Ushiwakamura hurriedly, and rush off to the center of the meadow, where many cow eating grass...

"UMMO!! Wives! descendant! I am back mooo!"

'Sigh... this damn h* cow...'

It might be seems too imaginary to say that Izana not yet eat for more than a week, but the same as his growth progress. Izana's body constitution is not normal, even as he have master degree in Biology from his previous world, there's not much difference from his body to another human, Except for the inborn chakra that is...

Normally, he needs to eat, but the need to eat has been replaced because he ability to cultivate. By cultivating he's able to make his cell to eat the Chakra and nature power. So little by little his cell evolved more stronger than before... 

In addition, by his knowledge from his previous world's cultivation novel. The chakra could be used to cultivate the soul while the Nature power could be used to cultivate his body. Well, the opposite could be done but there's a massive amount to make him able to do it...

I.e when Izana want to cultivate his soul using Nature power he must need to be in Nature World, because another world's Nature power were not as massive as this, and to cultivate his body using chakra means he needs a high level soul to produce more chakra.

As of now, Izana's soul has reached the advance level while his body has reached the level of a intermediate level. Why was his body only reached intermediate while his soul in advance level? it's because he have not reach his peak yet, if he get himself a body more stronger than that it will stop his body's growth.

Whether it's soul nor body, Izana level them as;

Normal > Beginner > Intermediate > Advance > Peak > Extreme 

While there are more stronger than Extreme level, that's still a hypothesis that couldn't be proved. But, the level he reach now is more stronger than most Nature world's animal, that normally get themselves in Beginner level only after they reach adulthood like Tender... Ushiwakamura there... so before reaching his peak growth and have Intermediate Class body is normally can't be done by normal human and nature animal.

If you make it the same as Naruto's world then Izana is in the level of a kage , to make it more simple to you to feel how monstrous he is... of course it is just a normal kage, not some abnormal one... 

This text was taken from Royal Road. Help the author by reading the original version there.

"YOU DAMN BRAT! HOW DARE YOU BRING INTRUDER HERE!"

shout come out from the only house that make of a dry long grass, and some mini earthquake accompanying that shout.

"HiiMOOO! Father, no he isn't an intruder he is Izana-sama!"

*Crack!* the sound of the vow that being made is break.

"Ho.. so this is what happen when the vow accomplished huh..."

From the house come out a 2 meter tall bull, at least while he's on four he is 2 meter tall. but, when he stand up... He reach 5 meter tall, and by each step the land leave his footprint. it is a humongous minotaur...

"Intruder! you are a human?!"

"Yah, so what?"

"How dare you enter this place! it is not a place where could make a contract!"

"Contract? ah... no I'm not here to make a contract..."

"Then? you want to hunt us?!!"

"UMMO! what?!"

"Nah, not really... but it will be if you don't meet my demand that is..."

"Don't be cocky human child! YOU WERE NOT WORTHY OF BEING IN FRONT OF ME!"

*whooosh*

the minotaur throw a punch in the direction of Izana, along with his body that move closer and closer to Izana.

and, when it get's closer... 

*tap tap*

Izana tapping the ground with his feet and, a 6 meter thick earth wall come out below the minotaur and before him. at the same time the minotaur succed in hitting the wall before him, he get himself thrown from the ground into the sky.

With just that, Izana defeat the Minotaur. 

*BAM*

The fallen Minotaur leave a hole in the ground when he gets up. Then, he look at the monstrosity of the human child in front of him...

"Stay easy... I want to challenge you in a confrontation between our fist, by then I want you to acknowledge me as you king!"

"..."

"See, I don't need to do this. but, I know without defeating you in a fist fight you won't bow down and call me your king so, bow down to me when I defeat you later!"

"A... For there is the time that the great chief Taurus beaten by such a child..."

"So, Taurus... do you accept my duel request?"

"If you lose then?"

"I'll do anything you want..."

"Alright I accept..."

"okay make a vow, 'by the name of the Great nature I Izana will accept any demand that I could accomplish from Taurus. In a duel 3 days from now'"

"... 'by the name of the Great nature I Great chief Taurus will accept any Izana as the king of our Ushi nature animal. In a duel 3 days from now' sigh... for the great me to be seriously injured just from that..."

*crash!* *whoosh* The nature become the judge and, every Ushi Nature animal under the Chief's govern became it's betting pieces...

thus... 3 days of recuperation needed for Taurus to recover himself... 

and 3 days later... 

~~~

"HAHAHAHA! SO FUN! SO THIS IS WHAT YOU CALL FIST FIGHT HUMAN!" *Fly*

Taurus flying outside from the arena because Izana's Judo throw.

"HAHAHA! TAURUS! YOU ARE STRONG! WORTHY OF BEING MY FIRST FIST OPPONENT IN THIS WORLD!"

Izana jump, to avoid Taurus's attack.

"I ESPECIALLY LIKE THIS ARENA YOU CREATE! THIS IS MAKE MY BLOOD BURNS AN INTENSE WILL TO FIGHT!"

"OF COURSE! A BATTLE LIKE THIS! IS WORTHY TO HAVE A SPECTATOR! AND I WILL LET THEM SEE, THE POWER OF THEIR KING!"

the battle getting more and more intense, the Ushi nature animal... They have more than 200 in the meadow, the power of them is mostly at Beginner class and rarely at Intermediate Class. While it's only Taurus that have Advance class...

To make it more simple to understand, a Beginner Class capable to fight against 10 Chunin, and the extermination mission is being branded as C class mission. While Intermediate class is branded a B+ class mission need of 10 jounin and astonishingly Advance Class is Branded as A++ class mission that need a Kage class and several jounin... of course, this mission term will be created in the future that already known but not now...

Seeing the battle, the Ushi Nature animal being more and more astonished by the one who call himself their king... this little human kid... is a monstrous existence, and... by the time the sun set... the battle ended...

*Drop*

*pant* *pant* 

"hahahah! see that! you got yourself panting after battling against me!"

shout Taurus to Izana.

"hah! talk the one who get drop down!"

The battle end, and the winner is Izana... Without using any power of nature and Chakra he win... against an opponent who stronger than him in physical level by one class by using many martial arts technique...

Using every bit of power left in his body, Taurus kneel on one leg and say...

"according to the vow... I and my Tribe will deem ourselves as your people, and acknowledge Izana-sama as our king. and, by the conscience of myself, I vow that I will always follow you as my king... Izana-sama!"

"IZANA-SAMA! OUR KING!"

started by Taurus's vow, every Ushi Nature animal acknowledge themselves as Izana's follower, and Izana... By that time, Izana's plan starting, and the first move of his plan... accomplished...