A few days later, on a small island in the East Blue.
"We're here. This is where I'll be giving you special training."
On the shore, Garp stood with his hands on his hips, a mischievous grin on his face.
This island was uninhabited, covered with fierce beasts and venomous insects, all of which were exceptionally strong, making it an excellent training ground.
At this moment, Luffy and Uta could hear various beast roars and insect chirps, continuous and exceptionally eerie.
However, Luffy paid no attention to it at all.
If this were a beast island in the New World, he might worry about not being an opponent.
But in the weakest of the Four Blues, the East Blue, what kind of powerful beasts could it breed?
At most, they would be like the Lord of the Coast.
At this point, Garp continued to speak.
"Do you know, Luffy?"
"Actually, a powerful force has always been hidden within you."
"This power awakened once when you were born."
"But at that time, you released it unconsciously."
"Now, I'm going to teach you how to control this power."
Roar!
Just then, a terrifying beast roar sounded.
Appearing with it was a giant beast, five or six meters tall, lunging at them from one side, baring its fangs and claws.
Luffy tilted his head, his gaze sharpened, and an unparalleled aura instantly emanated from his body.
Immediately after, the beast began to sweat profusely, its expression filled with terror. Its eyes rolled back, and it fainted.
"Are you talking about this?"
At this moment, a casual remark floated from Luffy's mouth.
Garp nodded repeatedly like a rattle drum at the sight.
"Exactly, exactly. That's what I was going to teach you."
"…"
Suddenly, Garp's body seemed to have been paused, freezing in place without moving.
His mouth hung open, his eyes wide, looking at Luffy in disbelief.
After a moment of stupor, Garp shouted in a roaring, incredulous voice.
"When did you learn to control Conqueror's Haki, Luffy?!"
Garp's shout instantly silenced all the beast roars on the entire island.
Luffy dug at his ringing ears and said casually.
"Probably when I was three! I could already control it proficiently back then."
"What did you say?!"
Another deafening, earth-shattering roar.
Both Luffy and Uta couldn't help but cover their ears.
"I say, old man, can't you speak a little quieter?!"
Luffy didn't know how this old man's voice could be so loud; his eardrums felt like they were about to burst.
"Sorry, sorry."
Garp saw the two children's pained expressions and immediately recovered.
"Hoo…"
At this moment, Garp suddenly let out a long breath and then said.
"Since you've already mastered Conqueror's Haki, there's nothing more for me to teach you."
He had originally thought that Luffy had awakened Conqueror's Haki but had never received proper guidance.
Now, with Luffy potentially facing danger, he had planned to offer some guidance.
But who would have thought that this kid had comprehended the mysteries of it on his own, and had even mastered it at the age of three?
This monstrous talent was simply unheard of for him.
Perhaps even his former opponents, Roger, or even Rocks, couldn't compare.
However, since Luffy had already mastered it, there was nothing more for him to teach.
As for more advanced uses of Haki, like Haoshoku Haki Infusion, Garp hadn't even considered it.
No matter how monstrous the talent, it was impossible to learn it at this stage.
Absolutely, impossible!
Luffy saw that Garp seemed to have no intention of teaching him anything else, and immediately began to think of a countermeasure.
This was a rare opportunity. Normally, this old man had no interest in teaching him, so he absolutely had to get something out of this old man now.
"What? So this is your most powerful move?"
"Marines aren't that strong after all! Pirates are definitely more impressive."
Luffy interlocked his fingers, rested his head on the back of his neck, and whistled sideways, looking disappointed in the Marines.
Garp immediately perked up when he heard Luffy's words.
Saying Marines weren't good, not as strong as pirates?
How could he tolerate that?
It seemed his grandson didn't want to be a Marine for this reason!
That made sense; he had never taught Luffy, never shown him the Marines' power.
And Luffy often interacted with pirates passing through the village, which made him yearn for pirates.
Especially a great pirate like Shanks; Luffy must have seen some powerful ability in him that attracted him.
In other words, as long as he showed the powerful side of the Marines, Luffy might change his mind and return to Marineford with him to become a Marine.
Thinking this, Garp clashed his fists together, immediately filled with motivation.
"Hmph! Luffy! Grandpa will show you the strength of the Marines today."
"Watch closely, Luffy!"
After saying that, Garp walked to a giant rock.
He raised his right fist, and a black sheen immediately enveloped it.
Immediately after, Garp's entire aura suddenly changed.
An unparalleled, powerful energy surged from his body, flowing towards his fist.
The energy was tangible, like purplish-black flames coiling around Garp's fist.
Immediately after, Garp gave a light swing forward, and the ball of flame flowed from Garp's arm to the giant rock.
Boom!
The seemingly effortless attack instantly shattered the giant rock.
"How was it, Luffy? Was my move powerful enough?"
At this moment, Garp retracted his fist, looking proudly at Luffy.
"Your comprehension is heaven-defying. Through personal observation and realization, you have comprehended - Armament Haki Infusion - Ryuo."
The prompt in his mind made Luffy overjoyed.
But he still feigned dissatisfaction.
"Is there nothing more powerful? I can break a rock too if I hit it enough times!"
Once again looked down upon by Luffy, Garp was thoroughly energized.
"Hmph! Luffy! I'll show you what the top power in this world looks like."
Garp came to the seashore, looking at the boundless sea before him.
Suddenly, he leaped, as if disappearing from his original spot.
"So fast."
Luffy was secretly shocked.
When he found Garp's figure again, he was already a hundred meters in the air.
Then, a more powerful energy than before surged out from Garp's body.
That energy was like a purplish-black lightning, spreading outwards from Garp's fist as its center.
The terrifying purplish-black lightning seemed to cover the sky and the sun, dimming the sky a few shades.
The terrifying airwaves were like a hurricane, stirring up giant waves on the originally calm sea.
Even though Luffy and Uta were standing hundreds of meters away on the shore, they were unstable due to the strong wind.
Then, Garp's figure changed, clenching his fist and diving down.
An unparalleled powerful pressure suddenly erupted, and terrifying energy swept down from above, as if engulfing the entire sea.
The purplish-black lightning tore through the air, emitting terrifying roars.
"Sea Bottom Drop!"
Garp roared from mid-air.
He was like a god descending to earth, carrying immense power, and slammed this world-shattering punch towards the sea.
Just as Garp was about to touch the sea surface, an invisible barrier seemed to isolate him.
Instantly, the entire sea was like hundreds of thousands of dragons emerging from the ocean, stirring up monstrous waves.
And within the range of Garp's attack, the sea surface sank deeply, forming a bottomless, boundless, and unfathomable abyss.
Luffy and Uta were completely shocked by such a sight.
This terrifying power was truly beyond their current imagination.
However, what filled Luffy's heart more was surprise.
Because...
"Your comprehension is heaven-defying. Through personal visualization and experience, you have comprehended Haoshoku Haki Infusion."