Without changing timelines, he used the magic door and appeared in Konoha's secret registry of forbidden jutsus.
Knocking out the guard who was protecting the place, Noah didn't hesitate and used his telekinesis to pull all the scrolls into his 4D pocket, leaving the shelves completely empty.
That same night, he did the same in each of the Five Great Shinobi Villages.
When he arrived in Iwagakure, Noah searched first for a specific person.
Kurotsuchi, the granddaughter of Tsuchikage Onoki and wielder of the Fusion Element Kekkei Genkai.
Noah extracted some of her blood, but she woke up. Fortunately, a sleep-inducing spell rendered her unconscious again.
After getting what he wanted, Noah looted Iwagakure's secret jutsu archive before leaving that timeline.
---
In the middle of a battlefield, Dan Katō lay on the ground, his life fading with each passing second. Three enemy shinobi approached his body, making sure he wouldn't get up again.
Then, without warning, the ground beneath them turned into a swamp. A torrent of water surged from nowhere, trapping the three ninjas in a watery prison.
"Suiton: Water Prison."
A figure cloaked in black with an eclipse symbol on their back suddenly appeared on the battlefield, face hidden behind a mask.
The enemies tried to break free, but before they could react, Noah formed hand signs at superhuman speed.
"Suiton: Water Colliding Wave."
A massive wave rose and crushed them with unstoppable force. They didn't have time to scream before being dragged and slammed into trees, their limp bodies falling to the ground.
With the enemies eliminated, Noah walked over to Dan. He knelt beside him, placing a hand on his chest. The Konoha shinobi could barely breathe, his glazed eyes staring into the sky.
"It's not your time yet," Noah murmured.
He channeled water chakra into his hand, applying pressure to the wounds to slow the bleeding. Then, he used a healing jutsu to accelerate tissue regeneration.
Dan gasped, his gaze regaining some clarity.
A sudden noise signaled the arrival of reinforcements. Tsunade and her team stormed into the area, alarmed.
"Dan!" Tsunade shouted, running toward him.
Noah stood and gave Dan a pat on the shoulder, who was still weak.
"Take care of her," he said calmly.
Before anyone could react, he vanished in a swirl of leaves.
Tsunade dropped to her knees beside Dan, making sure he was alive.
"Who was that?" one of the Konoha shinobi asked.
Dan, still recovering, gave a faint smile.
"Someone who lent us a hand."
After a moment of reflection, Noah realized there was nothing else in this world that interested him for now.
"Tsk, knowing the plot and having a time machine really is a massive cheat."
Pushing aside distracting thoughts, he returned to the world of Harry Potter.
---
Sitting in front of a high-tech monitor, Noah carefully observed the ongoing simulation. On the screen, a complex DNA sequence rotated slowly, broken down into thousands of lines of genetic code. At a glance, it was perfect: his own genome, enriched with the valuable Kekkei Genkai he had collected.
The simulation progressed, patiently integrating each new genetic line into his base structure. First, elemental manipulations of metal, ice, and fusion/lava. Then, Kekkei Genkai types like Magnet Release and Storm Release.
Next came body-related abilities such as Kimimaro's Shikotsumyaku, Sakon and Ukon's molecular-level body manipulation Kekkei Genkai, and Jugo's Kekkei Genkai, which allowed passive absorption of natural energy.
Finally, two dōjutsus: a Byakugan in the right eye and a Sharingan in the left.
Each addition seemed to fit at first, but as the genes fused, problems emerged.
Noah narrowed his eyes as a red alert flashed on screen.
"Critical error in genomic stability. Cellular collapse detected."
In seconds, the genetic structure fell apart like a house of cards collapsing under its own weight. The simulation restarted automatically, but Noah already knew the outcome. He had seen it time and time again.
He crossed his arms, exhaling in frustration.
"Too much information in a single organism…" he muttered.
Noah initially thought it was due to adding too many Kekkei Genkai at once, destabilizing the DNA structure, but even when testing them one by one, the genome would still collapse.
He rested his elbow on the table and rubbed his temple, analyzing his options.
"I need a stabilizer… Something that can unify all these elements without conflict."
It was a complex challenge, but not impossible. If he wanted to take his body to the next level, he needed to find the key to surpass the natural limits of shinobi genetics.
And he had an idea of where to start. He recalled a substance that perfectly met his requirements: the chemical compound A0-3959X.91-15, or black liquid for short.
A biological agent of unknown origin found in the bodies of Xenomorphs, capable of rewriting the genetics of any organism and forcing evolution.
It existed in the Alien universe, used by the Engineers to manipulate life. If he could obtain a sample and understand its function, maybe he could adapt it to his own body without losing control.
Resolving himself, he opened a portal directly to the other side and emerged in a desolate, hostile landscape. Massive ruined structures loomed under a dim sky—this was the planet where Alien: Romulus took place.
Noah moved through the area, analyzing his surroundings. It didn't take him long to find what he was looking for: a semi-deteriorated human base, with a still-operational ship on its landing pad. The crew was inside, preparing for departure.
He smiled calmly. This would be easy.
He raised a hand and whispered a spell.
"Imperium Totalis."
The magical wave spread silently through the structure. In seconds, all pilots and crew members fell under his control, their blank stares awaiting orders.
Noah boarded the ship calmly and took a seat in the cockpit.
"Take me to the spacecraft orbiting the planet. Now."
The pilots obeyed without hesitation. The ship took off and left the planet's atmosphere, heading for its destination. Meanwhile, Noah reviewed the ship's systems and accessed the logs.
The Romulus was a biological research and containment vessel, loaded with the most dangerous artifacts humans had discovered in this universe. Exactly what he needed.
Noah walked calmly through the dark corridors of the Romulus.
His eyes scanned every detail with precision as he advanced through the metallic structure. He wasn't alone on the ship; there was a group of teenagers who had foolishly come here to die miserably.
He turned a corner and there they were: the group of protagonists, armed and tense, ready for any threat. Beside them, the android Andy assisted, his expression fearless but filled with concern for one of the girls.
"Who the hell are you?" one of the teens spat, raising the metal rod in his hand.
Noah didn't respond. Instead, he raised a hand and murmured a spell.
"Petrificus Totalus."
Andy's body froze immediately, his mechanical joints locking on the spot. His head tried to move, but the paralysis reached his neural system.
"Finite Incantatem."
Andy powered down instantly, his eyes dimming. The humans barely had time to react before Noah cast a second spell.
"Imperium Totalis."
The group's minds fell under his control instantly. Their terrified expressions vanished, replaced by total obedience.
"Now stay here and don't interfere," Noah ordered calmly before storing Andy's body in his 4D pocket.
After exploring the containment labs, he found what he was looking for: a secured case with samples of the black liquid.
But his work wasn't finished yet. In one of the cryogenic chambers, aligned in a row of sealed containers, several cryogenically frozen Facehuggers rested inside capsules, perfectly preserved.
"I can't waste this opportunity to obtain so many specimens..."
He took several capsules and stored them. With his mission accomplished, he retraced his steps, leaving the group of protagonists paralyzed, with no memory of what had happened.
Wasting no time, he opened a spatial vortex and vanished from the ship.
For the remainder of the summer, Noah fully immersed himself in the study of the black liquid. He analyzed the substance using every resource at his disposal, dissecting its molecular structure, testing its effects on tissue samples, and simulating its interaction with various genetic combinations.
Eventually, he reached an undeniable conclusion: once he used the black liquid on himself, his DNA would stabilize permanently. That meant any further change would be impossible. If he wanted to reach his final evolution, he had to plan every detail before taking the leap.