That afternoon, the Revolutionary Army commanders—including Koala—held a farewell banquet for Logan.
Afterward, they escorted him all the way to the gates of the base, watching as he stepped onto the Nimbus Cloud and departed.
Early the next morning, Sabo led the senior commanders to the nearest coastline.
Everyone was confused.
No one knew why they had been brought here.
Before long, a small wooden raft appeared on the distant sea, drifting slowly toward shore with the wind.
Standing on the raft was a figure wearing a Hannya mask—white face, fanged grin, twin horns atop the head. A massive greatsword was strapped to his back.
The moment they laid eyes on him, many felt a chill crawl up their spines, as if a cold, ominous presence were pressing down on them.
As the raft neared land, the masked man stepped into empty air and descended lightly onto the shore.
"This man," Sabo said calmly, "will be the Chief Instructor of the Revolutionary Army from today onward."
Only then did the commanders understand.
They had been waiting for him.
"Tsk. Playing tricks and hiding behind a mask."
Terry Gildeo, the Intelligence Control Officer, sneered.
"I really don't see what qualifies this person to be our Chief Instructor."
Even Belo Betty, one of the army commanders, frowned slightly, her expression uneasy.
Only Koala stared intently at the Hannya-masked man, her brows knitted.
Why does he feel… familiar?
"This appointment comes directly from the Chief," Sabo said sternly.
"How you choose to respond is something you should weigh carefully."
The masked man stepped forward, his voice hoarse and low.
"That's fine. Anyone who disagrees—step up."
After a brief pause, he added calmly:
"All of you at once is fine too."
He removed the greatsword from his back and planted it upright into the ground.
"Good."
Gildeo's face darkened.
"I was just about to test your worth."
He drew his twin blades. The instant they left their sheaths, both swords turned jet-black.
A powerful aura surged upward as Armament Haki condensed along the blades, violet light coiling tightly around them.
"Violet Light Slash!"
Two arcs of purple light intertwined in midair like roaring serpents, charging straight at the masked man with overwhelming force.
"If you can't even block this," Gildeo snarled,
"then you're not fit to be anyone's instructor. Go back where you came from!"
He held nothing back.
If an impostor were allowed to take this position, countless soldiers would die on future battlefields.
Every eye locked onto the masked man.
How would he respond?
The man beneath the Hannya mask was, of course, Logan—returned as expected.
He had anticipated resistance.
Hidden behind the mask, a relaxed smile curved his lips.
Even facing such an attack, he remained calm.
Logan drew the Sea-Prison Stone greatsword in one smooth motion.
The moment it touched his palm, the blade turned pitch-black.
At the same time, he adjusted his breathing into an unnatural rhythm.
It felt as though the sea behind him, the wind around him—
even the air itself—had merged with his body.
He raised the sword and brought it down.
"Armament Haki · Water Breathing · Sever the Sea!"
A massive azure sword wave tore across the ground, carving a trench two meters deep into the white earth as it surged forward.
BOOM!
The blue slash collided head-on with the twin violet serpents.
In an instant, both purple arcs were cleaved apart, bursting into blinding light.
The violet energy dissipated—
—but the azure blade continued onward, its power undiminished.
It struck Gildeo squarely.
His expression changed drastically.
In desperation, his body darkened as he reinforced himself with Armament Haki—
yet he was still sent flying over fifty meters away.
When he finally stopped, blood spilled from his mouth.
"So… strong…" he muttered in disbelief.
By the time anyone realized it—
Logan had vanished.
The next instant, he appeared behind Gildeo, the massive greatsword resting against his neck.
"I concede."
Gildeo let out a bitter laugh.
With a clang, his twin blades fell from his hands.
Belo Betty and Koala stood frozen for a heartbeat—
then both broke into wide smiles.
To have such a man as their Chief Instructor…
What an honor.
Even Sabo—who had long known Logan's strength—couldn't help but gape after witnessing that single, overwhelming strike.
He finally understood.
The gap between them was enormous.
He clenched his fist silently.
Before meeting Logan, he had believed himself peerless among his generation.
Now he knew better.
A frog at the bottom of a well, staring at the sky.
Big brother… would always be big brother.
And now, Sabo had another summit to climb.
At noon, beneath the blazing sun, the atmosphere grew heavy.
The coastline was packed with people.
All mid-level and above commanders—
including Sabo, Belo Betty, Gildeo, Koala, and hundreds more—stood in formation.
Before them stood the Hannya-masked man.
His face unseen.
But everyone knew—
This was the Chief Instructor personally invited by Dragon.
Those who hadn't witnessed the morning's battle had only heard rumors:
A single strike. Gildeo defeated.
All eyes burned with anticipation.
Logan scanned the crowd calmly, then spoke.
"My time is limited."
"I will teach here for seven days only."
"If you master what I teach—Total Concentration Breathing—
your strength will undergo a qualitative leap."
The crowd erupted into murmurs.
"What kind of technique boosts strength so fast?"
"This sounds too good to be true…"
Logan ignored them.
Time would answer everything.
"What I'm teaching you is Total Concentration Breathing."
"It's a breathing method that enhances cardiopulmonary function,
allowing your blood to absorb vast amounts of oxygen—
temporarily pushing your physical abilities far beyond normal limits."
"But understand this," he continued calmly.
"Once the effect ends, your body will suffer extreme exhaustion."
His gaze swept across them.
"My requirement is simple."
"You won't just learn it yourselves."
"Once you do—you will teach it to every soldier in the Revolutionary Army."
"Now—watch carefully."
"The most important thing is to feel the changes in my body."
Logan inhaled deeply.
In that instant, oxygen flooded every cell in his body.
From behind the Hannya mask, the commanders could clearly see—
white vapor pouring from his mouth and nose.
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