'Now that I have Karma... what should I do? Should I exit the Life-death Arena and wait for it outside? But I know Murphy's Law, and maybe I can complete this Ōtsutsukification here in this time-space???
Let's wait for a while until at least one percent is complete. If the time taken is not too much, then I can stay here and maybe even train for a while."
Few hours later
Sagittarius Tenth Style: Celestial Judgment
Itachi threw Sagittarius into the sky, where it expanded rapidly and transformed into a huge black sphere with a diameter of one kilometer.
"Fall."
With Itachi's command, the black sphere fell onto the ocean. The moment it touched the water, it transformed into a black hole as it sucked the surrounding water from tens of thousands of meters into its infinite space while annihilating everything.
[DING! IT HAS BEEN DETECTED THAT THE HOST IS MERGING WITH A FOREIGN KARMA. THE BIOLOGICAL DATA CORRESPONDS TO THE UCHIHA BLOODLINE WITHIN THE HOST.
DOES THE HOST WISH TO PERFECTLY MERGE WITH ŌTSUTSUKI ISSHIKI'S KARMA?]
Hearing this, Itachi stopped practicing and paid attention to the System. Although it was unexpected that the System would help with this, with its assistance, he might be completely safe.
"System, how much time will it take to merge with this Karma? And what about Isshiki's resurrection?"
[ WITHOUT THE SYSTEM'S ASSISTANCE, THE HOST WILL ACHIEVE A 100% MERGER WITH OTSUSUKI ISSHIKI'S KARMA WITHIN FIVE YEARS.
WITH THE SYSTEM'S ASSISTANCE, THE PROCESS CAN BE REDUCED TO LESS THAN THREE MONTHS. DOES THE HOST WISH TO RECEIVE THE SYSTEM'S ASSISTANCE? ]
"Will I be unconscious or something like that during the process if I ask for your help?"
[NEGATIVE. THE HOST WILL REMAIN CONSCIOUS AND CAN USE ALL HIS ABILITIES EXCEPT THE KARMA ABILITIES.]
"Then, let's merge with Isshiki's Karma."
[COMMAND ACCEPTED.
BEGINNING THE PERFECT MERGING OF ISSHIKI'S KARMA.]
'Three months, huh? Maybe I can use these three months to get more comfortable using Sagittarius and Yggdrasil.'
Summon Sagittarius
"Hey, Mirror Clone, you will use Yggdrasil, and I will use Sagittarius. Let's see who wins."
"Heh, interesting."
---
Three Months Later
[THE HOST HAS REACHED 99% ŌTSUTSUKIFICATION. UPON THE COMPLETION OF THE FINAL KARMA MERGER, THE HOST WILL GAIN FULL ACCESS TO ALL OF ISSHIKI'S ABILITIES.
DOES THE HOST WISH TO PROCEED WITH THE FINAL MERGER?]
"Yes, let's do it." Itachi, who was now resting on the leaf of Yggdrasil, nodded after seeing the system message.
The next second, he lost consciousness.
Few minutes later
"Didn't know the final merging would make me unconscious... thank God I am still in the Life-death Arena, or I might... not be in danger. Who can pass through Sagittarius and Yggdrasil and harm me?... Right, System, show me my character panel."
[MUGA SYSTEM
CHARACTER PANEL
NAME: UCHIHA ITACHI
AGE: 15 (Thirty-three months after transmigration)
KEKKEI GENKAI: MANGEKYŌ SHARINGAN (PERFECT) / BYAKUGAN / KOKUGAN (Can use the power of all three eyes simultaneously through any eye.)
KEKKEI TŌTA: FIVE-ELEMENT COMBINATION
DIVINITY INFLUENCE: 0% ↓
BLOODLINE INFLUENCE: 50%
CHAKRA LEVEL: UNLIMITED
NINJUTSU: BEYOND SIX PATHS LEVEL
GENJUTSU: SIX PATHS LEVEL
TAIJUTSU: SIX PATHS LEVEL
SPECIAL SKILLS:
LIFE-DEATH ARENA (EX-LEVEL)
FŪINJUTSU (EX-LEVEL)
DOMAIN EXPANSION – WHITE HOUSE (TRANSCENDENT)
DIVINE GODS:
SAGITTARIUS (STRONG SIX PATHS LEVEL)
YGGDRASIL (STRONG SIX PATHS LEVEL)
COMBINED STRENGTH: STRONGEST IN THE NINJA WORLD / THIS DIMENSION]
"Hey, this Ōtsutsukification increased my strength too much." Itachi, seeing the panel, said with astonishment.
There were many changes in the panel. The first is the addition of Byakugan and Kokugan in the Kekkei Genkai section along with his Mangekyō Sharingan, while the Five-Element Combination shifted to Kekkei Tōta. This means that he can now use all the Kekkei Tōta in the Ninja World by combining different elements.
The second is the complete reduction of Divinity Influence. This was expected, as with Ōtsutsukification, he had converted all the Goddess genes into Ōtsutsuki genes, making the influence null.
The third is the change of Chakra from Six Paths Level to Unlimited. It's not that he really had unlimited chakra, but it has become so huge that even if he uses chakra at the normal limit of Six Paths Level, it will never end because of his chakra recovery.
The fourth and final change is the increase of Ninjutsu to Beyond Six Paths Level. With the increase in the use of Domain Expansion, it was inevitable that this would happen, so Itachi wasn't that surprised.
His Domain Expansion, although at the Transcendent Level, on the same level as the skills of Rimuru or Anos, didn't increase his strength to the peak at once. It just reduced the effort to reach that peak by a hundred or a thousand times. The more he could delve into its use, the stronger he would become, with an almost infinite upper limit.
All these changes were reflected in the final evaluation: the strongest in this dimension, which means he is now second only to Ōtsutsuki Shibai who has surpassed this dimension.
"I should get familiar with my increased strength and various additional dōjutsu lest I become the second Ōtsutsuki Kaguya."
---
Three Months Later
"System, let's leave."
SWISH
Ninja World — Mizumori
"Sigh, I really have a strong craving for strawberry cake... six months without food. Although I can now survive without eating and drinking... it's too much... Should I eat now and then fight?... But I want to eat it in peace... Hah, let's end this."
Bow of Yggdrasil
Arrow of Sagittarius
Domain Expansion — 100% Hit Rate
Sukunahikona
Mangekyō Right Eye: Tariff (1000% damage increase)
Byakugan
Itachi formed a bluish-white bow made of lightning in his left hand. With his right hand, he stretched the string as a purple-black arrow formed on it. Then, after a few seconds, Itachi released the arrow in a random direction in front of him.
"Let's rest now."
---
Meanwhile, the moment Itachi released the Arrow of Sagittarius, it disappeared, or more like became microscopic, as it moved a few meters and then entered a space-time portal to the other dimension.
Then, without any interruption, it pierced Urashiki, who still didn't feel a thing.
Yomotsu Hirasaka
Amenosubaruboshinomikoto
Urashiki entered a space-time portal and escaped from the hundred-meter-long Susanoo sword. He appeared hundreds of meters away and waved his chakra fishing rod.
The next second, dozens of red chakra hooks rushed toward the different Kage, ready to harvest their chakra.
Dust Style: Detachment of the Primitive World Technique
Seeing Urashiki's attack, Ōnoki formed a cylindrical white beam and obliterated all the hooks.
"Ahhhh... inferior creatures, take this!"
Amenosubaruboshinomikoto: Ryūgū
Urashiki, seeing himself being cornered even in his avian form, decided to take care of the group one by one. The next moment, he raised his palm toward Izumi, who was flying while pointing her Susanoo sword at him.
From his hand, purple energy started to materialize, and within moments, a hundred-meter-long purple sphere formed in front of Urashiki. Another mass of bluish-purple energy gathered together to form a huge serpent hundreds of meters long behind the purple sphere, acting as a second form of attack.
"DIEEEE—" Just when the two sides were about to collide, Urashiki's attack suddenly dissipated into nothingness. Even he, who was shouting in anger, suddenly stopped as he also started to dissipate into nothingness.
Izumi, seeing this, paused as she looked at Urashiki dissipating with caution.
Few seconds later
Urashiki completely disappeared, leaving only a purple-black spear in his place.
"That's Itachi's weapon." Tobirama, seeing this, said quietly, though everyone nearby heard him.
SWOOOSH
The next second, Sagittarius rushed toward Izumi and buzzed strangely.
"Sagittarius is saying that we took too much time, and Itachi got bored, so he ended the fight early."
"When did he attack?" Tobirama, hearing Izumi's words, asked with a serious expression. He didn't see or sense Itachi entering the battlefield at all, nor did he sense Itachi ever attacking. If it were him instead of Urashiki, then the outcome wouldn't have been different, making Tobirama feel a little despair.
He can plan or strategize against an enemy, but to do that, he has to know the enemy and the way they attack. Itachi, who was already an unsurpassable barrier, had now become even more mysterious.
"Well, I don't know. Anyway, since Urashiki is dead, let's head back to the Ninja World. Although the Dusk Competition is void because of Urashiki's interference, we can still hold a banquet in celebration of the first defeat of an Ōtsutsuki."
"Hahaha, it doesn't matter who kills Urashiki. We should celebrate our Ninja World's first victory." Hashirama, seeing his brother's constipated face, laughed and eased the atmosphere.
"Let's head back." Shisui said while entering the purple portal.
---