After returning, he started practicing again like a maniac. The thing he likes the most is exploring the mysteries related to each dimension he travels to.
His first task is controlling each wind and fire chakra in his both hands separately.
...
After a few days,
Aoi glanced at the red, round fireball floating above his hand. It was a mixture of wind and flame, a new bloodline limit art, the scorch art.
'Separate control of chakra nature is successful, and then combining them, a new bloodline limit is gained. Next, it's time to learn the nature change of the lightning chakra and then gain more bloodline limit,'
Aoi thought to himself, then sensed chakra in his body, which is more refined and dense in quality than before.
"I also reached the limit of Chūnin; just when my sharingan reaches three terms, I will advance to Jonin," Aoi muttered thoughtfully, because during chakra extraction, squeezing his whole body cells and resurrection after death increased his chakra at alarming rate,
Also, resurrection talent repairs his cells and body instantly; it's like a perpetual motion machine; just his consumption of resources increased a lot, Aoi didn't care resources are nothing compared to the chakra and strength he gained.
...
A few more days passed.
Aoi raised his hand, and a lightning rod appeared in his hand. It's the lightning shape and chakra nature change that were shown in the anime by Sasuke. The second form of Chidori is also another form of Chidori, which involves throwing small lightning pins, which Sasuke used to deactivate the Deidara blasting clay art.
Aoi waved his hand small lightning pins ejected, and a 5-meter area around him was filled with lightning pins.
He nodded, satisfied, then raised his hand. A purple-red chakra squirmed in his hand like a liquid, then solidified into an arrow with fast air flow around it. Also, it's emitting a soft and stabilized sound wave.
'A new bloodline limit combining the lightning, fire, and wind attribute chakra nature: lightning change can solidify it's form; fire and wind make it liquid and possible to change it into any shape; and wind work's as a stabilizer between the fire and lightning chakra.' Aoi thought, then glanced at the arrow in his hand, which had a destructive vibe around it.
"What should I call this new bloodline limit? How about the destruction bloodline limit?" Aoi muttered thoughtfully, then nodded decided to call it that later. He is going to add more chakra nature to it in the future and make it his exclusive signature art.
Aoi then sensed the chakra in his body and started the combination chakra attribute and condensing bloodline limit.
Fire and Wind; Scortch Limit; Red hot flames, which can dry moisture from anything instantly, even air and body; the disadvantage is the water attribute and can be used for short-range attacks only.
Lightning and Fire; Thunder Burst Limit; red ruby lightning with burning and explosive effect; upon strike, it explodes; the disadvantage is the water attribute chakra; upon contacting water, its effect changes into paralyzing the opponent.
Wind and Lightning ; Swift Limit ; using wind and lightning combination to enhance body speed externally and body reaction internally. Disadvantage: extremely fast reaction and speed; without special physique and vision, it is not recommended to learn.
Lightning, Flame, and Wind; Destruction Limit; The fast and range damage effect has not been tested yet, but its disadvantages are that it can only be used for range attacks, not melee.
Aoi nodded, satisfied, looking at the four bloodline limit techniques he gained after combining all three chakra nature attributes.
Time passed like that, and Aoi learned more attack moves using all these four line bloodline limits and exercising regularly.
...
A few months later,
Aoi was walking through the clan's residential streets, looking at the gloomy faces of every Uchiha and the unusual atmosphere in the surrounding area.
'Probably Uchiha Shisui is dead, which means I have 18 to 20 months of time remaining.' Aoi's expression became thoughtful. After buying his usual necessities, he returned to his house.
Then, Aoi started training again.
"I have already learned the chakra nature change and form change of water; the next earth attribute is remaining. Although these aren't my innate chakra attributes, after practicing and exploring them, they are no different from the other three: fire, wind, and lightning, which means attributes can be gained if practiced systematically. In anime, it was also explained that some jonin work on second and third attributes." Aoi muttered thoughtfully glanced at the ice cone in his hand; he gained ice limits after combining water with wind elements.
Wind and Water; Ice Limit; can use ice elements to attack, be strong against fire, and disadvantage earth and wind.
Fire and Water; Boiling Limit; Water Type Attack; disadvantages is lightning.
Lightning and water; mist limit; using mist for tactical fights; disadvantage is wind.
Lightning, Water, and Wind; Thunderstorm Limit; a stormy attack with lightning and wind destruction.
More bloodline limits are yet to be explored. Aoi has been practicing constantly, and now he isn't worried about anyone spying on him. His senses officially cover the whole Uchiha Clan, even a little outside this range.
"It seems constant deaths and avoiding sleep for months have upgraded my soul and will also." Aoi muttered thoughtfully,
Sensing the gloomy atmosphere above the Uchiha clan, he becomes thoughtful, looking at the sky and dark cloud above. 'It's going to be rainfall.'
…
Eight more months passed.
Six-year-old Aoi, sitting cross-legged in his house courtyard, raised his eyelid revealing three dark terms rotating in his flickering red bloody pupil's.
"My Sharingan finally upgraded to three terms; it's getting more and more tough. I sometime wonder, will i awaken my mangekyō with such practice or not? I can take a risk in this final year remaining before genocide."
Aoi muttered thoughtfully, his sharingan then blurred away and his normal dark pupil revealed.
Aoi then sighed in relief, laying down on his back on the grass looking at the clear sky and slept the next moment. He hadn't slept for more than a month in order to evolve his sharingan, now he instantly went into deep sleep.
...