Nirvana

This was also related to some things Ye Mu had discovered while developing his Devil Fruit abilities.

Although Ye Mu was not a scientist like Vegapunk, he was the one who possessed the ability, a beneficiary of nine years of compulsory education and higher education back on Earth, and someone who understood the plot.

By carefully sensing the specific changes in his body while using his Devil Fruit, then comparing notes with Enel, he was still able to discover quite a few interesting things.

Of course, because both of them were Logia users, everything they discovered was related to Logias.

For example, while using his fruit ability, Ye Mu discovered that the ability of Logia Devil Fruits to produce elements was not endless.

To put it simply, taking Ye Mu as an example, although he had obtained the Flame-Flame Fruit, that did not mean he could use it to generate an infinite amount of flame.

The process was more like there was a certain substance inside his body.

Combining it with descriptions from the plot, Ye Mu named it: Lineage Factor.

This Lineage Factor could convert the physical energy in his body into flames. The more flames it converted, the more energy it consumed.

This also explained why the stronger a person's body was, the stronger their Devil Fruit ability would be.

This seemed like a flaw, but on the contrary, it proved that the superior-inferior restraint between Devil Fruits was not actually absolute. As long as the user was strong enough, they could completely ignore that restraint.

This also gave Devil Fruit abilities a path for advancement, even all the way to the final awakening.

For another example, Ye Mu discovered that the essence of a Logia Devil Fruit user's intangibility was not turning into an element to avoid attacks, but controlling the flow and transformation of the body.

To put it simply, a Logia Devil Fruit user could transform their body into an element, then flow and alter their body freely through the element they produced, like water.

This looked like nonsense, but it proved one thing: during intangibility, a Logia Devil Fruit user did not actually have no physical body. Rather, like water, they changed their own body and hid it within the element, making physical attacks unable to harm them.

This also explained why Haki could injure Logias.

A Haki user could use Observation Haki to locate the position of a Devil Fruit user's physical body during intangibility, then use Armament Haki to grab them.

This might also prove why some Logias were not afraid of Armament Haki. As long as the user's true body could not be found, even someone with Armament Haki would be unable to grab the Logia user's real body.

As for how an Armament Haki user grabbed an intangible ability user flowing like water, because Ye Mu had not awakened Armament Haki yet, he still had no way of knowing.

But Ye Mu had a faint guess. If one wanted to grab water, there were only two methods: one was to turn the water into ice, and the other was to use water to grab water.

If Ye Mu believed the two points he had discovered earlier were common characteristics possessed by Logia Devil Fruits—except, of course, for the Dark-Dark Fruit—

Then the interesting thing Ye Mu discovered next might only apply to Devil Fruits like the Flame-Flame Fruit, Rumble-Rumble Fruit, and Glint-Glint Fruit.

These three fruits shared one common trait: the elements they produced through intangibility, such as flames, lightning, and lasers, were pure energy, unlike the other known fruits at present, such as ice, magma, sand, smoke, and so on, which had an absolute physical form that could be touched.

This made these three types of fruit users even harder for Haki to capture.

At the same time, it gave Ye Mu a new idea. M.

This was also related to Ye Mu wanting to try developing the Six Powers himself.

Since he had come to the world of One Piece, before mastering Haki, the sooner he mastered a useful martial art like the Six Powers, the better. Besides, were there not rumors that the Six Powers were a basic version of Haki?

Of course, in the end, Ye Mu still gave up. It was not that he could not develop them, but after thinking it through carefully, he realized there was no need to waste precious time on them.

Because he discovered that, at present, the Six Powers were somewhat useless to him.

The Six Powers were divided into six major techniques: Shave, Iron Body, Paper Art, Moonwalk, Tempest Kick, and Finger Pistol.

But after Ye Mu thought about it carefully, he discovered that aside from Shave, the instant movement skill, being somewhat useful, his Devil Fruit already came with the other five techniques.

First of all, Iron Body and Paper Art were nowhere near as useful as intangibility. As for Tempest Kick and Finger Pistol, Ye Mu could display the same effects using his Devil Fruit. As for Moonwalk, he could fly with the Flame-Flame Fruit on his own.

As for Enel, he needed them even less. No matter how fast Shave was, could it be faster than the speed of lightning?

In a certain sense, Enel's Rumble-Rumble Fruit was even more versatile than Ye Mu's Flame-Flame Fruit.

So, rather than spend a huge amount of time on these somewhat useless physical techniques, it would be better to spend that time on fruit development and physical strengthening. After he reached the Blue Sea in the future, would it not be fine to just snatch them directly from CP9?

However, although there was no need to develop the Six Powers, when Ye Mu thought of the Six Powers, he remembered another very interesting skill: Life Return.

Life Return first appeared on Enies Lobby in the hands of that CP9 guy who looked like a lion. Through the ability of Life Return, he could control any organ of his body at will, such as his hair, internal organs, limbs, muscles, and so on.

In addition, in the later plot, Life Return also displayed effects such as quickly digesting food, recovering stamina, storing energy, and accelerating wound healing.

So an idea occurred to him: could he use the ability of Life Return to modify his own body and make it stronger and stronger?

Although Ye Mu had already made his body countless times stronger through hard training, he also understood that compared with those monsters, he was still far behind.

However, there was one problem: he did not know Life Return, nor did he know how to learn and master it.

But he had the Flame-Flame Fruit.

This was also why the special points of the Flame-Flame Fruit, Rumble-Rumble Fruit, and Glint-Glint Fruit had been mentioned earlier.

They could turn their own bodies into pure energy. It was just that the way it manifested was different.

Then, could he slightly modify this ability and turn it into another kind of Life Return?

After all, for Logia Devil Fruit users, although whether they could change external matter and convert it into elements was still uncertain so far, Ye Mu could at least control his own body. Naturally, that included the food he ate.

Thus, after having this idea, Ye Mu spent a full three years cautiously experimenting step by step, and finally managed to develop it.

He called it: Nirvana.