The deep sea world always presents unexpected sights.
Like hundred-meter-long giant eels, thousand-meter-long terrifying sea snakes, bizarre fish covered in deadly venom...
Of course, the prerequisite for seeing these things is having sufficient lighting.
But on pirate ships in this era, such advanced lighting technology is rare, with very few exceptions.
Even if they possessed such lighting capabilities, most people wouldn't choose to turn it on in these pitch-black deep-sea areas.
After all, activating the lighting system here would be no different from directly inviting those massive predators to come feast on them.
Even Jake and Monet were no exception.
Both were Devil Fruit users, and if their ship were damaged in such a place, their chances of survival would be slim.
But to be honest, Jake wasn't particularly worried about this.
After his Holy Light Energy reached level 50 and he successfully awakened, he discovered that the side effects of the Devil Fruit had become practically negligible for him.
Even in seawater, he would only feel a slight weakness—just a minor discomfort.
If he cast a purification effect on himself, he wouldn't experience any discomfort at all.
As for water pressure, Jake wasn't concerned about that either.
Holy Light Protection could create a shield around his and Monet's bodies, perfectly resisting the pressure.
Long before Jake planned to enter Fish-Man Island, he had already conducted thorough tests in Vegapunk's laboratory.
This was precisely why he felt so confident now.
Of course, he wasn't the type to go looking for trouble.
If he could avoid being attacked by those massive sea creatures, he'd prefer to spare himself the ordeal.
The two didn't turn on any lighting, letting the ship sink quietly into the depths.
After passing through a stretch of completely lightless waters, the lower half of the sea was no longer so dark.
Everywhere, there were glowing scales from giant Sea Kings or the illumination from lanternfish.
The breathtaking beauty of the underwater world left Jake and Monet momentarily stunned.
They chatted and laughed, marveling at sights they had never seen on land.
But as the ship continued descending, Jake suddenly noticed it tilting slightly to the left.
Though it was just a tiny shift, this strange movement still struck him as odd.
He looked around the ship.
Despite the illumination from numerous Sea Kings, some areas remained pitch black.
However, this wasn't a problem for Jake's Observation Haki.
As Jake's Observation Haki spread outward, he keenly detected an enormous head appearing behind the right side of the ship.
"What is that?!"
The moment he sensed it, Jake whipped his head around—but it was already too late.
Like Jörmungandr from myth, a massive, pitch-black serpent head suddenly opened its maw.
Countless gallons of seawater and Sea Kings were sucked into the serpent's belly, and the terrifying suction force didn't spare Jake and Monet's ship either.
In an instant, Jake watched as their ship was pulled toward the serpent's gaping mouth.
Seeing this, Monet paled slightly.
"Jake, what do we do now? That thing... it's just too enormous!"
Listening to Monet's words, Jake gently patted her shoulder and said.
"Trust me, I'll be right back!"
With that, Jake instantly disappeared from the deck, his body shimmering with a pale golden light like a shooting star as he shot straight into the giant serpent's mouth.
"You're too reckless! Jake!"
Monet watched from the deck with an anxious expression, but she had no way to stop Jake since she lacked the ability to move freely underwater.
Meanwhile, Jake stared at the abnormally large sea serpent with growing excitement.
If his guess was correct, this serpent's body likely contained the rarest longevity substance in the One Piece world—
Pure Gold!
This traced back to events surrounding a girl named Olga who was dying from a serious illness 200 years ago.
At that time, Olga's father invented a substance called "Pure Gold" to save his daughter from death.
Using it granted extended lifespan—both father and daughter lived for nearly 200 years.
While called lifespan extension, its true effect was to slow human aging to near standstill, achieving virtual immortality.
Since this was originally from a movie, Jake had always assumed it didn't exist in reality.
But just now, when he saw this giant serpent, an inexplicable sensation suddenly emanated from its abdomen—
A peculiar electromagnetic wave from some metallic mineral, unlike anything Jake had encountered before.
Combined with the serpent's impossibly massive length, Jake instantly connected it to the Pure Gold from the Heart of Gold movie!
With that substance, his body too could gain immortality!
This was precisely why Jake was so exhilarated.
Aside from the ultimate ability of the Ope Ope no Mi, there were few means in this world to achieve eternal youth.
Staring into the enormous serpent's eyes, Jake felt not a shred of fear, only excitement and joy.
Transforming into lightning, he surged into the serpent's maw, riding powerful currents straight into its stomach.
Inside, the scene mirrored exactly what Luffy had seen when entering the Sky Island serpent's belly—
Not much flesh or bones, but instead vast ruins and rocks.
Standing atop a stone, Jake closed his eyes, amplifying his perception until he locked onto the strange mineral's location again.
It was in the serpent's rear tail section!
Without hesitation, Jake bolted toward the target.
Any living Sea Kings in his path were swiftly dispatched with lightning strikes.
He needed to hurry—the ship he and Monet were on was still outside, and he didn't want anything to happen to her.
At Jake's full speed, even several kilometers took less than ten seconds.
Spotting the faintly crimson Pure Gold lodged in the serpent's innards, Jake's eyes gleamed brightly.