[Friendly Reminder: You are in a man-made lightning zone, a special sign-in location. Successfully signing in will grant a special reward.]
'Special reward?'
Naruto's eyes immediately lit up.
'Since the system actively reminded me, it meant this location was extraordinarily special.'
'After thinking about it, that made sense. After all, without Sasuke's Kirin, who would randomly summon lightning in such a place?'
"Orochimaru, take them to the village first. I have something to deal with here. I'll join you shortly."
As he said that, Naruto handed Orochimaru a kunai with the Flying Thunder God's mark.
Orochimaru nodded slightly, took the kunai, and hoisted Sasuke over his shoulder before opening a black gate.
In order to avoid unnecessary trouble, Kisame, Itachi, Hidan, and Kakuzu all simultaneously used Transformation Techniques and followed Orochimaru through the gate.
Once they left, and the black portal closed slowly behind them, Naruto pulled out a deck chair from his system inventory. Relaxing on it, he reclined leisurely, awaiting the sign-in's completion.
[It is detected that the host to have stayed in the man-made lightning zone for one hour. Sign-in successful. Special reward granted: Rumble-Rumble Fruit!]
'Rumble-Rumble Fruit?'
'What is this thing?'
Naruto frowned slightly, 'The name didn't seem particularly impressive. What's so special about it?'
Without guessing further, Naruto opened the system panel and just looked at the reward's details, and everything became clear at a glance.
[Rumble-Rumble Fruit: From the manga One Piece, this is a Logia-type Devil Fruit. Upon consumption, it transforms the user's body into electricity. Abilities include: immunity to physical attacks, the ability to hide within conductive materials, and freely release high-voltage electrical currents for attacks. Users can move at lightning speed, amplify their Observational Haki's range with electromagnetic waves, and self-revive by jumpstarting their heart after critical injury. The electricity provides an endless energy source, making this one of the strongest Logia fruits!]
"F*ck!"
After reading the description, Naruto was completely dumbfounded.
Initially, the fruit's name hadn't rung a bell, but when it mentioned being a Devil Fruit from One Piece, Naruto immediately understood.
'The Rumble-Rumble Fruit was the very power that belonged to Enel, the 'God' of Skypiea!'
Naruto had watched One Piece in his previous life and was deeply impressed by Enel. If not for Luffy's rubber body being immune to electricity, Enel would have been almost unbeatable.
Whether it was the sheer destructive force of lightning, the speed of movement, or the immunity to physical attacks, every ability granted by the Rumble-Rumble Fruit was absurdly overpowered.
Most importantly, there were no rubber men in the Naruto World.
'Wouldn't eating it make me practically invincible?'
Just when Naruto was getting excited, the system prompt sounded again.
[Friendly Reminder: Devil Fruits are referred to as the 'Embodiments of the Sea Devil'. They resemble ordinary fruits, but their skin is covered with strange spiral patterns. The taste is so bad that those who eat it want to vomit. Only the first person to consume a fruit gains its power, and subsequent consumers experience no effects. However, Devil Fruit users will be cursed by the sea, losing all strength in bodies of water, including pools, bathtubs, and even hot springs.]
"Wait, what? It's not just seawater, but pools and bathtubs too? Then how am I supposed to bathe? Or… uh… train in hot springs?"
Naruto frowned.
'If this was true, eating the Rumble-Rumble Fruit would be a double-edged sword. A single Water Release Ninjutsu could render me helpless, forcing me to flee for my life.
[Friendly Reminder: The host has two options. The first option is to consume the Rumble-Rumble Fruit as-is and accept its drawbacks. The second option is to let the system modify the Rumble-Rumble Fruit, eliminating all side effects.]
"What else is there to consider? Of course, choose the second option."
Naruto couldn't understand the system's thought process, 'If the modification eliminated the side effects, why didn't it just make the change outright? Did the system really need my input, or was it just waiting to watch me struggle for entertainment?'
[The host has made a choice. Rumble-Rumble Fruit has been successfully modified.]
As soon as the system prompt ended, the Rumble-Rumble Fruit in Naruto's hand emitted a radiant golden light before returning to its usual state.
Its outward appearance remained unchanged, but Naruto trusted the system. After all, so far, it had been fair and reliable when it came to rewards.
"Down the hatch!"
Naruto wasted no time and devoured the Rumble-Rumble Fruit ravenously. Almost immediately, arcs of electricity began dancing across his body.
[Successfully consuming the Rumble-Rumble Fruit. Congratulations to the host for becoming the user of the Rumble-Rumble Fruit!]
"I... just got stronger again!"
Naruto declared, clenching his right hand into a fist toward the air.
'Hmm?'
He clenched again, harder this time.
'Huh?'
'How come nothing happened?'
Naruto couldn't help but frown and said, "System-sama, why can't I generate electricity?"
He couldn't help but start to worry, fearing that he had made a big mistake.
There is an old saying coming to his mind: There is no such thing as a free lunch.
'Could removing the Rumble-Rumble Fruit's side effects have nerfed its abilities as well? If so, that would be an absolute disaster!'
[Friendly Reminder: Please check the ability's description.]
Hearing this, Naruto hurriedly reopened the system panel to check the description.
[Rumble-Rumble Fruit (Modified): The side effects of the original fruit have been removed. The modified Rumble-Rumble Fruit is divided into five stages. Progression to each stage requires meeting specific conditions.]
[Stage 1: Amplifies the power of all Lightning Release Ninjutsu twofold.
Conditions for advancing to the Stage 2: Sign-in at Kumogakure in the Land of Lightning. (Status: Available, not yet completed.)
Stage 2: Grants lightning-speed movement.
Conditions for advancing to the Stage 3: Sign-in at the residence of the Nibi's Jinchuriki, Nii Yugito, in Kumogakure. (Status: Unavailable, not yet completed.)
Stage 3: Enables summoning of nature's lightning during thunderstorms, with an attack power equivalent to Lightning Release: Kirin.
Conditions for advancing to the Stage 4: Sign in at the residence of the Hachibi's Jinchuriki, Killer B, in Kumogakure. (Status: Unavailable, not yet completed.)
Stage 4: Grants a lightning-based elemental body, immune to physical attacks.
Conditions for advancing to the Stage 5: Sign in at Enel's residence on Skypiea in the One Piece World. (Status: Unavailable, not yet completed.)
Stage 5: Unlocks the Rumble-Rumble Fruit's full capabilities, allowing you to wield lightning wherever your thoughts reach!]
After reading the densely packed skill descriptions, Naruto's mood became a mix of relief and frustration.
'As expected, there was no such thing as a free lunch.'
'While the side effects were gone, the Rumble-Rumble Fruit's full potential was now locked behind a series of arduous sign-ins.'
The first three advancement conditions are easy to meet, after all, Naruto had always planned to visit the Land of Lightning eventually.
However, the last condition for advancing to the Stage 5 is insane.
While Naruto knew the system could transport him to Skypiea thanks to what happened with Poke Ball, the real challenge wasn't the destination but the timing.
For the condition to mention Enel's residence specifically, it meant the self-proclaimed 'God' had to still be alive.
So if Naruto wanted to sign in at Enel's residence, Enel would undoubtedly regard him as a villain who trespassed into the residence of god and rebelled against god.
That practically guaranteed a fight against Enel himself… a confrontation Naruto couldn't avoid.