I am brushing up materials in One Piece

The next day, after breakfast, Kos found a thick tree on the shore and started punching.

However, he did not punch the tree trunk like a storm like he was practicing Muay Thai. Instead, after every punch, he would sit cross-legged and meditate for a while, then stand up and concentrate on throwing a punch, and then sit down again...

After he continued like this for more than two hours, Ace finally came over curiously,

"What are you doing?"

"Exercise armed domination."

Kosi spoke concisely and punched again at the same time.

The area of ​​damage caused by this punch was more than twice that of the first use of Armed Color Haki yesterday. Considering the depth, the power should have increased several times.

In other words, in this day, the armed domineering energy in Kos's body has changed from a seed that is so small that it is almost negligible, into a... seedling that grows two young leaves.

Even if it is called a seedling, it is actually a bit exaggerated. After all, the armed domineering energy that is exhausted with one punch is really useless. Even the enhancement of the attack can be basically said to be minimal. It is better to use it directly. The improvement brought by the knife is huge.

Speaking of using swords, after practicing Armed Haki, Kos finally understood why there were so many strong physical warriors in the world who did not use weapons.

A martial arts master once said that "unarmed fighting is just a child's trick", because for creatures like the terrifying erectus, they are in their complete state when they hold weapons. Even Master Ye who can fight ten , you should always use a feather duster when facing an opponent with a knife.

This principle is also true in this world. Even if many people's physiques are not comparable to those in Kos's original world, a good weapon can still greatly improve a person's combat effectiveness.

And the weapons in this world are not just traditional weapons such as swords, guns, swords, halberds, axes, hooks and forks. Various devil fruit abilities and armed colors bring many new possibilities.

However, while Devil Fruit abilities bring new attack methods, they may also limit the holder's possibilities in certain aspects.

For example, you let Luffy become a swordsman? Can he do it? Can't do it.

Because while the rubber fruit brings him body extensibility, it also makes it difficult for him to hold the sword firmly like ordinary people, and the sword moves he makes will also be "soft" due to his physical characteristics. It's okay to bully the weak, but when fighting an opponent who is evenly matched or stronger than you, you are looking for death.

So Luffy's only weapon is his own rubberized body.

At the same time, Armed Color Haki will produce a certain amount of loss when it is transferred to other objects, which results in the difference between the use of weapons and non-armed Haki being not so obvious between users of Armed Color Haki.

Using weapons can significantly improve one's attack range and attack power, but using all the armed color Haki to strengthen oneself can reduce the consumption of Haki, and the purity of Haki wrapped around the weapon will be wrapped around oneself no matter what. The purity of domineering is low.

That's why there are pure physical warriors like Garp who reach the top of the world with just a pair of fists.

"Armed Haki, this again."

Ace pursed his lips in distress. He had heard Cos talk about the topic of armed domination when he was surviving on an isolated island, but he had never been able to understand what it was.

"Didn't you feel nothing special when you were beaten by your grandfather before?"

Kosko still remembered that under his nose, Garp raised Ace's Armed Haki to LV3 just by beating him.

After hearing what Kos said, Ace began to try hard to remember, but he didn't even know where the end of the universe was, so how could he remember the experience of being beaten many days ago?

So he quickly smiled sheepishly and said, "I can't remember!"

"In that case, don't use your power and punch this tree with all your strength."

Kos pointed at the tree that he had destroyed for half the morning, and then made way for Ace.

"Ok."

Ace swung his right hand around and around like a windmill, and then punched out suddenly

"Boom-ka-"

Ace's punch first broke the thick tree trunk, and then the broken trunk flew out and broke several smaller trees behind.

"You use this again."

Kos picked up a stone from the ground and threw it to Ace. He pointed at a tree similar to the one that Ace broke and said,

"With rocks in hand, I hit this tree."

Despite not knowing what Kos planned to do, Ace did it anyway.

"Snapped--"

But this time he only left a huge hole after taking action, and did not directly break the tree trunk.

"Eh?"

Ace also noticed the difference between his two attacks. He also understood that the attack would be stronger when there is something in his hand.

"How is this going."

But Kos looked like he had expected this.

Ace had long ago learned Armed Haki under Garp's Iron Fist of Love education, and it wasn't that he didn't know how to use it, but he unconsciously used Armed Haki in every punch when launching an attack.

But because it was used unconsciously, he didn't know how to attach the armed color Haki to other objects.

"Just like what I said on the island, you have actually mastered Armed Color Haki. You have unconsciously used Armed Color Haki when you punched."

"Oh, that means I can hit that smoking guy next time I meet him!"

Ace looked at his fist and laughed happily,

"Finally, you don't have to worry about that kind of rogue ability that you can't hit at all."

"Well, your own abilities seem to be as shameless as Smog's natural type, right?"

Kos rolled his eyes at Ace for an unknown number of times.

"Oh, haha, it seems so."

Ace reacted belatedly and smiled awkwardly.

"and also……"

Cos said very seriously,

"Your current armament domineering level has not yet reached the level of being able to attack the natural element."

"Really? Hey!"

As he spoke, Ace's veins popped out in his right hand, and he punched himself in the face.

Of course, his punch failed.

Then he understood that what Cos said was true.

"You have to at least wait until you can train your armed color Haki to the point where it can appear black."

Kos told Eskop seriously, but in fact this was just a conjecture of his own.

"Oh, how should I exercise? Do I want to punch like you?"

Ace put on a boxer's stance and punched the air several times, each punch causing a powerful and crisp sound.

"I don't know either. I'm just practicing randomly now. I don't know if this method will work for you."

Kos shook his head. He really didn't know much about the training of armed domineering. He just knew that he might need to be beaten more, but who could hit Ace who can transform into elements now?

"Wait? It seems there is."

Kos looked at Dongli and Brockie who had already started the second fight of the day.

Although they didn't use it in the battle against each other, both of them have LV5 armed color Haki, so it should be no problem to hit the elementalized Ace.

But seeing the two of them playing happily, Kos decided not to disturb them for the time being.

At the same time, he had something else to experiment with.

"Ace, stand still, let me test my fruit ability."

Ace didn't ask any more questions. He just stood up straight expectantly and looked at Kos curiously, wanting to see what new abilities he had prepared.

Kos spread his hands, and five chains sprouted like kelp floating in the water, and then stabbed Ace, passing through his chest and limbs respectively without any obstruction.

"Move now."

Kos gave the order, and Ace tried to move his body, and was surprised to find that as his body moved, the chains passing through his body also moved.

"These chains are connected to my body!"

Ace was surprised at first, and then began to move his limbs stiffly like a puppet in a funny way.

"so fun."

"it is as expected."

Kos showed an unexpected expression again.

After upgrading the fruit's ability yesterday, he found that it neither increased the range of control over the chain nor made it easier to control, so he wondered if some special ability had been added.

I tried it today and found that it was indeed the case. Although I couldn't pin down Ace and Smoke as easily as I did in Rogge Town, it still had a certain restrictive effect on ability users.

At least I can deal with it if I encounter a person with natural abilities in the future, without having to let Ace go up and exchange arrogant punches with the other person.

"Now that you have developed new fruit abilities, I can't lag behind!"

Ace, who had had enough of playing puppet shows, suddenly became full of fighting spirit.

"I also need to develop new abilities!"

Looking at Ace, who just now was thinking about exercising his armed domineering energy, and now he wanted to develop his fruit ability, like a child, Kos smiled helplessly.

Ace, like Luffy, doesn't try too hard to become stronger. Even if they fail, if it's not something important like their companions, they will just continue to move on heartlessly after losing.

Kos felt that if he wanted Ace to seriously work hard to become stronger, at least one person on the ship must be sacrificed, and the effect of sacrificing himself and Deus should be the best.

But now that Ace is interested, Cos will naturally not miss the opportunity to guide him. After all, Ace's strength was not a big problem in the first half of the Grand Line, but after entering the new world, it was almost meaningless. It would be nice to help him grow a little.

"The moves I taught you before to control the burst time and distance are just small tricks after all. The most important thing about your fruit ability is the temperature."

"Temperature, um~ let's see how hot my flame is now"

Ace nodded after hearing this, then raised his right index finger to light a flame, stretched out his left index finger to poke the flame on his right index finger...

Kos frowned, but not because of Ace's seemingly stupid behavior, but because he realized that it was not easy for Ace, whose whole body could turn into flames to burn, to feel the difference in temperature.

This is as impossible as asking a person to lift himself into the air (although there are really people in this world who can do this).

If you can't understand temperature, you can't raise the temperature of the flame. Then the ability development ideas provided by Kos for Ace can only lead to death before the start.

After putting his finger into the flame and feeling it for a long time, Ace realized what was wrong and quickly realized what the problem was.

"Looks like I need to find something hotter than me."

Then he immediately looked at the "alarm clock" where Dongli and Broki were fighting - the many volcanoes on the island.

"Will the temperature of the magma be higher?"

Ace began to think about this issue seriously, and at the same time, some not-so-good memories came to Kos's mind.

"Uh-well, let's forget it."

To be honest, Kos is a little worried that Ace is easily soluble in magma. After all, the physical rules of this world are different from the world he originally lived in. It would not be fun if the magma could really swallow the flames.

"How will you know if you don't try!"

After making up his mind, Ace ran towards a volcano that was smoking and about to erupt.

Kos, on the other hand, was dragged by Ace because of the chain connection and was forced to start running. At first, he tried to hold Ace several times, but failed due to lack of strength, and later gave up.

He took back the chain and followed Ace to the volcano.

Although these volcanoes in the small garden erupt from time to time, they are actually not very destructive. When they reach the sky, they only throw out a few half-melted rocks and a little volcanic ash.

When you stand in the crater and look down, you will find that the "water level" of the magma is very low, and there is no upward trend. It is just churning like boiling water.

But no matter what, this is a volcano, and Kos can feel the burning of his hair when he sticks his head in just a little bit.

"Hey, do you really want to go down? The things churning down there are not just flames, but also molten rocks. Even if you are a user with the ability to burn fruits, you may not be safe."

Because he had seen Ace being pierced through the heart by a magma punch, in Cos' eyes, the unsafety of the magma below could be said to be full.

"You seem to be afraid of this?"

No matter how slow he was, Ace noticed that Cos was acting strange from just now, so he patted him on the back and said,

"Isn't magma just a burning stone? How could I be hurt by something burning?"

However, Kos's expression did not ease at all, he just looked at Ace quietly and shook his head.

"The future you see...no, it's nothing."

Ace stopped mid-sentence, then jumped directly into the crater.

The incident happened so suddenly that Cos had no time to hold Ace and could only watch as he fell into the magma.

Because magma is much denser than water, Ace did not sink into it all at once, but kept sinking downwards little by little.

Cos, who felt half cold, quickly created a chain and tried to pull Ace out before he completely sank. But before his chain could reach him, Ace moved his hands to both sides like a swimming motion, and his feet moved. Kick - the whole person dived into the magma.

－－－－－－off topic－－－－－

sorry it's late today

And, this chapter is 4000 words long