Hearing that, Rowan flashed Tsunade a bright smile.
"Oh, this changed a lot. I finally understand where my power comes from."
"Thanks. If not for the Door-Door Fruit, I'd still be completely in the dark. Now I finally get it."
Tsunade asked, "Oh? Then let's hear it."
She wanted to know too. Being able to travel from one world to another was absurd no matter how you looked at it.
Rowan said, "It's an ancient golden gate. That gate collapsed once before, and somehow later fused with me. After I ate the Door-Door Fruit, that ancient gate recovered a tiny little bit."
Rowan pinched his fingers together, showing just how tiny that "little bit" was.
"So?" Robin asked curiously. "What does the gate do?"
"Oh, it does a lot."
Rowan said, "You already know it lets people travel between worlds. It also lets us communicate without barriers. Even if I speak Chinese, you can still understand me."
Everyone nodded.
Rowan continued, "But this time the ability evolved. Once I enter a brand-new world, I automatically gain that world's language."
"And when I invite someone from another world into mine, they automatically gain my world's language too."
"Also, Tobirama's earlier guess was right."
"After I enter a brand-new world, my body automatically adapts to that world's power system. I can learn any power that exists there, whether it's Haki from the One Piece world, chakra from the Naruto world, or magic from a world of mages."
"And now, I can grant that same kind of supernatural adaptability to all of you."
As he spoke, Rowan patted Hashirama on the shoulder.
"Give it a try. See if you can awaken Conqueror's Haki."
Hashirama nodded, focused his gaze, and tried to activate Conqueror's Haki.
Boom!
Black-and-red lightning erupted at once.
He had already been pressured by Rowan's Conqueror's Haki several times before, so he wasn't unfamiliar with it. Now that he had gained the qualifications to learn this world's power, awakening Conqueror's Haki wasn't difficult for him at all.
As the God of Shinobi, he had the talent for it.
A terrifying wave of Conqueror's Haki burst outward like a raging storm, covering a radius of several thousand meters.
Countless fish were overwhelmed by the pressure, foaming at the mouth as they floated to the surface.
Nami and Karin's eyes rolled back, and with a thud, both of them collapsed to the ground, knocked unconscious by the Haki.
Everyone else except Rowan felt suppressed as well. Their bodies grew heavy, and breathing became difficult. Fortunately, most of them had already been tempered by Rowan's Conqueror's Haki before.
They had built up some resistance to it.
So under Hashirama's Haki, they didn't pass out.
As for why Kanae, who was facing Conqueror's Haki for the first time, hadn't fainted, it was because her willpower was just too strong.
Back in the Hidden Grass Village, she had been bitten and drained again and again, even having her life force siphoned away.
She had long since grown used to pain. She could endure it, and in that pain she had forged a will like steel.
Forget Hashirama's Conqueror's Haki—even Rowan's might not have been enough to knock this mother out.
Women could be fragile, but mothers were strong.
"Alright, stop showing off and put that away already."
At that moment, Tsunade shouted. Hashirama's Conqueror's Haki wasn't as overwhelming as Rowan's, but being suppressed by it still wasn't pleasant.
Hearing her, Hashirama gave an awkward laugh and immediately withdrew it.
Everyone let out a sigh of relief, then turned their burning gazes toward Rowan.
Conqueror's Haki really was absurdly useful. It might not work against battle-hardened jōnin, but against fresh genin or the sort of mediocre chūnin padding the ranks, it would be devastating.
They might not all be able to awaken Conqueror's Haki, but every one of them wanted the physical constitution of people from the One Piece world.
That world's humans were just too ridiculous.
Just look at Robin. She hadn't even been extracting chakra for that long, and her chakra had already surpassed that of a Konoha chūnin and reached jōnin level. Her progress was unbelievable.
Who wouldn't want that?
Rowan didn't hold back. One by one, he granted everyone present the qualifications to learn the One Piece world's abilities.
Tsunade moved her arms and legs around a bit, but didn't feel much of a change yet.
Rowan smiled and said, "Of course nothing's obvious right now. But the change will become more and more noticeable over time. Your training results will improve, your appetite will grow, and your body will gradually become inhuman."
He himself was the best example.
When he first entered the One Piece world, he had been an ordinary person. He couldn't carry much, couldn't lift much, and couldn't even finish a standard serving of seafood fried rice.
But now, Rowan could lift two or three hundred jin with one hand, run a hundred meters in under eight seconds, and eat one and a half or even two full standard portions of seafood fried rice in a single meal.
In the One Piece world or the Naruto world, that kind of strength still made him nothing but weak fodder.
But on Earth, he was basically a superhuman.
If he entered track and field, he could casually shatter world records and collect championships like candy.
If he entered weightlifting, he could kill the competition in the first round and leave everyone else in the dust.
If he entered boxing, even Tyson would have to kneel and beg for mercy.
That was the value of being able to lift two or three hundred jin with one hand.
It meant that when Rowan threw a punch, the force behind it would absolutely exceed prime Tyson's. Breaking a normal Earth human's fragile bones would be as easy as snapping a chopstick.
Who could possibly withstand that?
And that was just raw physical strength. If Rowan used chakra to reinforce his body on top of that, he wouldn't even dare enter a competition.
He was afraid he'd end up in prison.
Robin used the power of the Flower-Flower Fruit to create a row of arms and lift the unconscious Nami and Karin, preparing to carry them back to their rooms.
"I'll do it."
Rowan spoke up and casually pushed open a door in midair. On the other side was Nami's room. He carried both girls inside, laid them on the bed, and left Kanae to look after them.
Robin asked, "That's the Door-Door Fruit's power?"
Rowan gave a small hum.
Tsunade asked curiously, "Didn't you say the Door-Door Fruit's power was absorbed by the golden gate?"
"It was," Rowan said. "But that doesn't mean I can't use the Door-Door Fruit's power. In fact, any power absorbed by the golden gate becomes something I can use."
"The Shinigami was like that before. The Door-Door Fruit is the same."
"And because it was the golden gate that absorbed the Door-Door Fruit's power, not only can I eat a second Devil Fruit…"
He smiled.
"I also won't be weakened by Seastone or the sea anymore."