No wonder Borsalino was so frightened that he snorted.
Rosen's actions were truly horrifying.
If you can temper a black blade in three seconds, you could become a black blade wholesaler.
I guess even Dracule Mihawk would cry after seeing this.
Fortunately, Gecko Moria dug up Ryoma Shimotsuki's grave, otherwise Ryoma's coffin lid would not have been able to hold him down.
"Is this the legendary black blade?"
"Mr. Rosen, you… you tempered my sword into a black blade?"
Domino stared blankly at the saber Rosen handed back to her, completely confused.
Although her strength was average, she still had some knowledge.
A black blade—
No matter what quality the weapon had before, once it is tempered into a black blade, it becomes a famed sword more precious than even many Supreme Grade blades.
But what about now?
Rosen had actually refined one in front of her and given it to her.
"This is so precious."
"I can't accept it."
"A weapon like a black blade can only unleash its true power in your hands. If I use it, it's like a pearl covered in dust."
Domino quickly pushed the black blade back toward him.
"This is not a black blade."
Rosen held down Domino's hand.
"How could it not be a black blade?"
Domino picked up her sword again and found that Rosen was not touching the weapon, nor releasing Armament Haki, yet her sword still maintained the appearance of a black blade.
Not only her, but even Zephyr and Borsalino on the warship pricked up their ears and stared intently at Rosen.
"The black blade is just the external appearance."
"The reason for this change is that I sealed my Armament Haki into your sword."
"As long as you don't use up the Armament Haki sealed within your saber, it will always maintain the appearance of a black blade."
Rosen's words made Zephyr and Borsalino, who were not far away, breathe a sigh of relief at first—but then their eyes immediately widened.
What?
Seal Armament Haki?
They both knew that Armament Haki could be transferred to weapons, but unless it was continuously supplied, or a short time had passed, the Haki would dissipate from the weapon.
They had never expected a Haki seal like the one Rosen was using now.
Rosen's mastery of Haki, especially in terms of technique, is truly far ahead of the entire Grand Line.
Such a thought flashed through Zephyr's mind.
"What's the point of just doing this?"
"Sealing Haki onto the sword—even if it keeps the sword in a state similar to a black blade, or even completely turns it into one—it's meaningless."
"A weapon like the black blade can only unleash its full power in the hands of a great swordsman."
Borsalino pondered.
Based on his understanding of his junior, Rosen would not go to the trouble of sealing Armament Haki into Domino's sword just for the sake of appearance.
With Domino's strength, even if she were given a genuine Supreme Grade black blade, it would be nothing more than a durable, sharp weapon in her hands.
"Use the Haki inside?"
Domino was also thinking about Rosen's earlier words.
"I didn't simply seal Armament Haki within the sword, but used a technique called Transcription Seal · Susanoo."
"I created a construct of Haki—Susanoo—and sealed it into this sword through Haki's inherent ability to be released and transmitted."
"As long as you hold this sword and connect your own Armament Haki with the Haki sealed within it, you will be able to use Susanoo's third form for one minute."
When Rosen said this, Borsalino and Zephyr, who had been listening intently, were both visibly shaken. They looked at each other in disbelief.
"Has he already reached this level with Armament Haki?"
"Even a construct like Susanoo can be sealed into a weapon, just like transferring Armament Haki—but allowing others to use it?"
"It's simply incredible."
Borsalino was secretly horrified.
This method was superficially similar to the ordinary transfer of Haki into a weapon, but the difference was critical—what Rosen transferred was not mere Armament Haki, but a pre-formed construct of Susanoo.
Not only could it remain sealed indefinitely, it could be controlled by whoever held the weapon.
Even Borsalino couldn't imagine the level of mastery needed to accomplish such a thing.
"Susanoo… can you?"
Domino was a little confused.
"Hold it well, and never let this sword leave your side—not even for a second."
"Because this is a talisman Rosen left for you."
"As long as you use the power sealed in this sword, for one minute you will be the most powerful woman in Impel Down. During that time, even Shiryu would have to retreat, and Magellan might not be able to harm you before the sword's power is exhausted."
At this moment, Zephyr spoke up, solving Domino's doubts and making her fully realize the power Rosen had given her.
"If there's a prisoner riot—"
"Even if you face a group of Level 6 monsters, as long as it's not a Yonko-class monster, you can suppress the entire prison with this sword."
Zephyr's words made Domino shudder.
"Mr. Rosen…"
Domino turned to look at Rosen with a complicated expression.
She hadn't expected that, after just cooking for Rosen for over three months, he would leave her such a precious gift before departing.
"Although it's almost impossible for prisoners to escape from Impel Down, riots do happen—often."
"I've always believed one thing: you never know whether an accident or tomorrow will come first."
"So keep it. This way, you have the power to face the unexpected."
Rosen's calm tone carried a faint trace of concern.
After spending several months in Impel Down, he had a good grasp of its reality.
Prisoners escaping? Impossible.
Riots? They happened every few days.
For example, a pirate working forced labor on the Fourth Level might suddenly snap.
And rebellion is contagious—whether in a military camp or a prison.
Domino was an excellent deputy warden, but her excellence lay in administration, not combat.
She could still handle prisoners from the first and second levels.
But if those on the third, fourth, or fifth levels rioted, she would be completely powerless to suppress them.
"This is too valuable!"
Domino didn't know what to say for a moment.
With Rosen's Transcription Seal: Susanoo, the value of this sword had instantly multiplied a thousandfold.
The weight of this gift was beyond anything she had imagined.
"It's nothing compared to having the same meals next time I visit Impel Down."
"If you think it's too valuable, then make the most of it."
"Next time we meet, you can cook for me again."
Rosen took the sword from her hands and fastened it at her waist. Without waiting for her to respond, he stepped onto the warship.
"Well, let's stop here."
"We're leaving now."
"Domino."
After boarding, Rosen waved to her.
Domino said nothing. She simply gripped the sword at her waist tightly, her gaze fixed on the warship as it left Impel Down and sailed toward the distant sea—watching until it vanished completely from view.
"I will definitely put it to good use."
"Mr. Rosen…"
"And… thank you."
...
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