One Piece: Enhanced Supreme Grade Sword

After putting down the batch of semi-finished enhancement stones, he left the laboratory directly.

Hill closed the laboratory door.

Their attention was drawn to "Ink Dragon No. 1" because Vice Admiral Garp's battle with Kaido had damaged its outer armor.

The entire right-hand robotic arm appears to consist only of a skeleton system.

"Since the enhancement stone can enhance the Thousand Cherry Blossoms, it should also be able to enhance the mobile armor. Let's repair the mobile armor first, and then try it out." Hill immediately began to work on the repairs.

Just as he picked up his tools, he suddenly remembered something.

He had almost forgotten about that thing.

"and many more."

"I extracted more than just Senbonzakura from the system."

Hill immediately walked to the testing table, squatted down, opened the cabinet in front of him, and took out a box from it.

Open the box.

Before him appeared a pill the size of a marble, and a second one, brownish-yellow in color, with markings somewhat resembling the stripes on a tiger's fur.

It was the first reward he drew from the system: the Youth Preservation Pill and the Zoan-type Cat-Cat Fruit in Tiger form.

"We have to give it a try," Hill decided.

They immediately took out a number of semi-finished strengthening stones and began the final process of making the strengthening stones.

It took about an hour.

Hill successfully completed more than one hundred finished enhancement stones.

It eventually stopped.

At the same time, he gained more than a million points. The point notification sound was so satisfying that Hill almost became addicted to it.

He decided to use the "Devil Fruit" first. He didn't even think much of this Zoan-type Devil Fruit, being a man who had transmigrated to the world of One Piece and possessed a system.

Anyone would say: This fruit is no good.

Unless one desperately needs the power of a Devil Fruit to survive, they would not eat this Zoan-type Devil Fruit.

Eating a Devil Fruit is a lifelong commitment, so he didn't eat it hastily and kept it in the box.

Gradually, he began to forget about them.

No hesitation.

Hill immediately took the enhancement stone and began to use it on the Devil Fruit, causing the surface of the enhancement stone to glow.

A corner of the enhancement stone began to fuse into the Devil Fruit.

"It's done!!!"

Upon seeing this, Hill couldn't help but shout with joy, his heart pounding wildly.

He watched with wide eyes as the enhancement stone disappeared into the Devil Fruit.

The enhancement stone has disappeared.

But...

Hill was somewhat puzzled. "Did it actually succeed...?"

"Still no success?!"

He looked at the Devil Fruit in his hand; its appearance showed no change whatsoever.

"Fine, let's try a few more enhancement stones!"

Anyway, the navy pays for it, it's not their own money, so they don't feel bad at all.

He immediately picked up another enhancement stone and began to enhance the Devil Fruit.

The enhancement stone was seamlessly integrated into the Devil Fruit.

But...

Its appearance remains unchanged.

"You can't wait until you eat it to find out, can you?!"

Hill had some doubts. "Whatever, I'll upgrade it to +12 first if I can."

The third enhancement stone.

The fourth enhancement stone.

The fifth enhancement stone.

"It's changed! Hahaha, the Devil Fruit has changed!!"

"The enhancement stone really worked!"

Chapter 52 Devil Fruit Upgrade! Another Upgrade

Looking at the "enhanced" Devil Fruit before him, Hill was overjoyed, filled with strong anticipation and hope.

He muttered to himself, "I wonder if I can evolve this Devil Fruit into a Mythical Zoan Devil Fruit?"

"These days, anything that isn't a Mythical Zoan Devil Fruit is considered inferior."

At the time of the time travel, Luffy's "Gum-Gum Fruit" had just transformed into a Zoan-type Human-Human Fruit Mythical Zoan Nikka form.

He is known as the legendary "Sun God".

This sparked heated discussions online, and its popularity soared, becoming known both inside and outside the industry.

Meanwhile, Wano Country has seen a series of Mythical Zoan Devil Fruits, Mythical Zoan Great Nyūdō Form, Azure Dragon Form, Great God Form, Phoenix Form, and Yamata no Orochi Form.

Add to that Luffy's Nikka form.

The Mythical Zoan type Devil Fruit, which is said to be even rarer than Logia-type Devil Fruits, caused a huge melee in Wano Country.

However, in terms of the number of Mythical Zoan-type Devil Fruits, there are still fewer than those of Logia-type.

But that's about right.

The color of the Devil Fruit in front of me has become a little darker, and the spiral patterns seem to have dissolved, forming spots.

"so..."

"What kind of Devil Fruit is this?!"

Just as he was wondering, a system notification sounded in his mind: "Congratulations, host, you have successfully enhanced your abilities and obtained the Zoan-type Cat-Cat Fruit, Ancient Zoan, Fear Cat Form!"

Fear of cats?

What kind of creature is this?

Hill didn't understand, but he was satisfied as long as he knew what the Devil Fruit was. "Ancient Zoan Devil Fruits are definitely stronger than ordinary Zoan Devil Fruits."

"It's only at +5 now, you can try to enhance it further."

He continued to use the enhancement stones on the lab table to enhance the Devil Fruit in front of him.

The sixth one.

The seventh one.

·······

It wasn't until the tenth enhancement stone was used that the Devil Fruit changed!

It's changed again!

Hill waited for the system's notification.

really.

A moment later, the system provided a prompt.

"Congratulations, host, on your successful enhancement! You have obtained the Zoan-type Cat-Cat Fruit, Ancient Zoan, Short Sword Saber-toothed Tiger form!"

Ok? !

When Hill heard the system notification, he was stunned. "Short-sword saber-toothed tiger? Could it be because the saber-toothed tiger form already exists?"

He remembered that one of the Flying Six members of the Beasts Pirates was an Ancient Zoan Saber-toothed Tiger.

so...

My enhancement rewards have been reduced?!

"grass!"

Hill was a little angry. "That guy's dead. Can my Devil Fruit evolve into the Saber-toothed Tiger form now?"

"Not a mythical beast, is she worthy of me?"

"If it's not a mythical beast, can it even be considered a serious beast?"

no!!!

Continue to strengthen.

Hill picked up the enhancement stone and slammed it down violently.

Strong 11.

no change.

Strong 12.

no change.

Hill didn't place the thirteenth one; he was afraid it would break.

Hill stopped, for the "abyss" lay ahead.

He muttered to himself, "I wonder if the system can draw something that increases luck? Or should I try something cheap for the thirteenth time to see what the success rate is?!"

Even if you figure out the probability, it will still cost a lot of enhancement stones.

He thought for a moment, "Next time I see Sengoku and Kizaru, I'll mention that I'll try using his Ame-no-Murakumo-no-Tsurugi, and get a few more."