As we all know, the Whitebeard is a person with the ability to shake the fruit. The shaking fruit is called the strongest superman fruit by the world. It can cause vibration at will, or even tsunamis, and earthquakes, and it can be said to have destructive power.

The Whitebeard at his peak is said to have the terrifying strength that can compete with three naval generals in one person.

However, sometimes the ability of the devil fruit may not bring all the benefits to the owner. Just like Luffy's rubber fruit, when entering the second gear and third gear, the characteristics of the rubber are used to generate the same principle as the pump to accelerate the flow of blood to obtain faster speed and stronger strength. However, the consequence of this is the huge load of the heart. The more you use it, the greater the damage to the body.

The earthquake fruit also has this problem. Whitebeard becomes a shocking person because of the earthquake fruit. When he uses his abilities, his own body will also shake, which has an impact on his own bones, muscles, blood and even internal organs. This impact may not be seen very much when Whitebeard was young, but as he gradually aging, this effect began to appear.

In short, Whitebeard's physical condition deteriorates is not just because of old age, but a common result caused by multiple reasons.

"We let Ain activate his ability to Dad!" Marco said: "Dad looks 12 years younger, but the problem is that his physical condition cannot be reversed. And the most troublesome thing is that the ability to reverse the fruit is only temporary. Once Ain falls into coma or falls into the sea, her ability will be invalid, and Dad will change back then."

Hearing this, Yian nodded thoughtfully. If he really hoped to make the regressive fruit to keep Whitebeard in her youth, then the Whitebeard Pirates might have to protect Ain in turn. She should not let her fall into the sea, nor could she become unconscious. No matter how you look at it, she would feel very troublesome...

There are many demon fruit abilities that Yian has seen and known. He has discovered an interesting phenomenon. It seems that some superhuman fruit abilities will become invalid after encountering sea water!

The simplest example may be Moonlight Moria. The zombie army created by his shadow ability. Once he touches salt and sea water, those shadows will fly back to the original owner. Ain is also a superman. I don’t know if her ability also has this disadvantage. If so, it would be meaningless.

Sure enough, things like staying young are actually lie... Although the regressive fruit sounds like a bug, after careful study, it is not that powerful. The ability of this fruit is quite useful in combat, but it is useless to rely on this ability to restore the peak combat power of Whitebeard or Zefa.

Yian wanted to give the Whitebeard a favor, but now it seems that I can't walk the road of Ain's regression fruit, so I can only use the card Iohime Inoue. But the problem is that Yian doesn't know how useful this is for Whitebeard.

Generally speaking, Ian uses Inoue Orihime card to treat his injuries, but the white beard’s injury is a small problem, which is simply some old injuries. His main problem is his age. In Ian’s opinion, even if it is Wanxiang’s rejection, he may not be able to refuse even a person’s age, right?

The specific effect can only be understood after a real experiment...

After the four of them played mahjong for a few more laps, they stopped. After putting it away, Ian and Ace walked to an open position with their fists, while Fujito and Marco watched from a distance.

These days, although I have been on vacation and having fun, Yian has never relaxed at all. Every morning after he wakes up, he will complete his exercise content under the gravity of Fujihu, and in his spare time, he will sit down and play mahjong with Fujihu.

In addition, Yian now has another task, which is to practice Ace!

Don't get me wrong. In terms of physical skills, Yian and Ace are only half a dozen, and he can't teach Ace. The only thing Yian can guide Ace is probably his ability to develop the roasted fruit.

Yian has always felt that Ace's ability development seems to be in the wrong direction.

Compared to when he first got the burning fruit, Ace has developed many moves using flames. His flames have become larger and more powerful. The fire balls shot out by a fire punch can even directly destroy a ship.

However, this is just an offspring application, and Yian feels that Ace has not grasped the essence of the roasted fruit.

What is the essence of roasted fruit? Temperature!

Yian himself also plays with fire. He has played with the flame of the evil king Yan killing sword of Feiying, the flame of the black dragon wave, and even the Cang Yan of the Eight God. It can be said that he still has his own intuitive feelings about the flame.

In Yian's view, the development of flame capabilities does not care about the appearance or whether it is huge or not. The key is still the temperature. Ace has been out of the way.

So these days, Ian has been trying to correct Ace's philosophy.

"Come on, let me see how much your temperature has increased now!" Yian hooked Ace and said with a finger.

Ace nodded without saying anything, his body instantly turned into a blazing flame, and his whole body immediately turned into a fire man, as if the body had also become larger.

However, Ian frowned and looked at Ace's changes. He found that Ace's current flame temperature has indeed increased, but this increase is caused by increasing the combustion area.

If we follow conventional physics, this makes sense, which means that Ace actually makes the combustion more fierce by contacting more oxygen.

The best way to actually increase the flame temperature is to start from the fuel aspect. Using different fuels, the temperature brought by combustion is also different. However, the problem is that Ace is now a flame, and he has no fuel to speak of. When he maintains elementalization, he actually consumes only his own physical strength. From this point of view, we can see that the unscientificity of the devil fruit is coming.

Fortunately, Ian had no hope of using scientific methods to solve unscientific things like Demon Fruit from the beginning. He knew very well that even without external assistance, there was a way to control the temperature.

Because Yian has seen such a person, Aokiji Kuzan!

Aokiji's freezing ability ultimately means reducing the temperature. He was originally a devil fruit abilities, but he could freeze sea water instead of being incapable by sea water. This is the reason.

Ace's ability is actually quite similar to Aokiji. Ice and fire are antonyms. Lowering the temperature makes the object freeze, while increasing the temperature makes the object burn.

And Ace now wants to learn from Aokiji, from controlling the flames to controlling the temperature.

As Ian kept talking, Ace was trying hard to do what he said, but it was indeed difficult. Imagination was one thing, and specific operations were another. Ace stood there and maintained the shape of a Super Saiyan for a long time. The raging flames soared into the sky, but the actual effect was very little.

Since Yian himself is not a devil fruit ability, he cannot specifically understand the feelings of Ace's elementalization, and can only guide Ace through words. After a while, Ace stopped breathlessly and said, "No, Yian, let me see your black flame again!"

Yian nodded and unbuttoned the spell bandage on his right hand. Now every time he has time, he will keep taming a black dragon wave on his right hand, so naturally Ace can watch it at any time.

After untiing the spell bandage, the huge heat of the black dragon wave suddenly emitted. The high temperature of the black dragon wave was not accessible to ordinary people, but Ace was an exception. He could even touch the flames of the black dragon wave with his own hands.

Not only him, but also Marco is also a fantasy beast species. Although he is an animal-type fantasy beast species, Marco is also a man with its own flames. Of course, the flames behind his transformation do not seem to be a real flame, but this does not prevent him from being able to contact Yian's black dragon wave.

"Haha, every time I see this black fire dragon, I feel very surprised! Although the flames are also blue when I transform..." Marco hugged his arm and said to Fujito next to him: "But, is there really such black flames in this world? No matter how hard Ace tried, he would probably not be able to turn his flames into this black, right?"
Chapter completed!