Adult Sasuke and Izuna inspect the formation area.
Sometimes Izuna will pause and mark a place.
Sasuke who is curiously following Izuna raises a question.
"Nii-san?! Have you awakened Rinnegan? If you have, then what are its abilities."
"You will naturally get your answers when the time comes. Also, even if you know about my abilities, it won't benefit our teamwork during the battle since there is none, to begin with."
Izuna chuckles and continues to map the area.
'Why does he even bother to ask when he already knows about them? It's not like my Rinnegan abilities will change much in the future.'
He maps the area and marks the nodes for the next two hours.
"Next up is a rough outline of the formation. Let me take a look from the skies."
Whoosh…
Izuna leaps in the sky and flies to an appropriate altitude to get a clear look at the entire area.
Whoosh…
Sasuke closely follows him behind.
"Oh! You can fly too." Izuna is surprised to see Sasuke fly.
"Yes! My visual prowess has returned. I spent quite a lot of chakra during the temporal leap."
Hmm…
"Your low chakra pool is one of your biggest weaknesses. But this doesn't seem to be the case anymore."
Izuna gazes at Sasuke as his eyes turn into Mangekyo Sharingan.
"Your chakra pool is almost on par with Naruto without the Nine-tails."
"Yes! I mastered the Snake Sage Mode and the Snake Sage helped me with my chakra problem." Sasuke nods his head.
"That old hag helped you?" Izuna raises an eyebrow, as he can't believe his ears.
"That old hag was so wish-washy when I asked her to help me and now, she is reluctant to help you. What sort of changes could make her do so? Wait! Don't tell me."
Izuna shakes his head and returns to the previous matter.
"Your chakra pool is fine and even your chakra control is fine. This can mean only one thing! Your technique! It's your technique that wastes a lot of chakra." Izuna speculates the reason.
"Tell me which technique do you use to travel through dimensions?"
"Hmm… it's Yomotsu Hirasaka. It's a Rinnegan ability and even the Otsutsukis uses this ability to travel through space." Sasuke replies.
"No wonder!"
Izuna shakes his head in disgust.
"Eh?!" Sasuke is surprised to see his expression.
"But Nii-san that's a Rinnegan ability and is very hard to master."
Sigh…
Izuna takes a deep breath and turns to Sasuke.
"Sasuke! It's not that I am undermining this ability. It's just that using this ability wastes a lot of chakra. Even the Otsutsuki you have met so far can't execute this ability properly. Yomotsu Hirasaka is an instantaneous technique, but it sacrifices efficiency at the cost of speed.
It might be good during a battle but it isn't an optimal technique while leaping dimensions." Izuna points out the flaws of the technique.
"I will teach you a different technique. Although this technique is slow compared to Yomotsu Hirasaka, it's very efficient. It only uses half the amount of chakra used by Yomotsu Hirasaka."
Izuna takes out an ancient scroll from his pocket and passes it to Sasuke.
Sasuke grabs the scroll and it almost slips from his hand.
"So heavy!!"
His expression turns serious and slowly opens the scroll.
"Ama-no-Ukihashi"
He reads the name of the technique.
"Yes, it's an ancient technique which I found among the collection of toads. Go and try to decipher this technique. It will be useful for your future battles." Izuna waves his hand and dismisses him.
Whoosh…
Sasuke flies away to a remote corner to practice the jutsu mentioned in the scroll.
Izuna stares at the scroll in Sasuke's hand and shakes his head.
'It's another technique of that 'Traveler' guy. This technique gave him an edge against his fight with Otsutsukis. He was traveling alone while a hoard of Otsutsuki was chasing after him.
Whenever things went downhill for him, he would use this technique and escape to another dimension. Those Otsutsukis could only use Yomotsu Hirasaka to chase him.
In the next dimension, the Otsutsukis would be weakened because of the lack of chakra. The traveler will use this opportunity to deal with a bunch of them and flee again.
In the end, he perished in this world and passed his legacy to toads, snakes, and slugs to look for a successor.'
"Anyway, let me survey the rest of the area."
He flies around for a while.
"Izuna-kun! Izuna-kun! Here!"
Kushina is waving at him from a distance.
Whoosh…
He flies towards her and lands on the ground.
"I heard about the situation from Minato. I won't let any bad guy touch my Naruto." She clenches her fist.
"I will help with the seal."
"Here!" Izuna passes the sealing scroll to Kushina.
Kushina curiously inspects the seal and her mouth opens wide in astonishment.
"Wow! Amazing! This is a work of art." She honestly praises Izuna.
Her skills with the Fuinjutsu have reached another level after inheriting the legacy of the Uzumaki clan. She is not on par with Izuna but she surely has leaped some distance to close the gap, just a little though!
'The legacy of Traveller is far better than the Uzumaki legacy. There is no comparison at all.'
Kushina passes the scroll to Izuna and extends her arms widely.
"Eh?!" Izuna tilts his head in confusion.
"Take me to the sky. I also want to fly in the sky."
"Oh!"
Izuna infuses some chakra into his palm and pats on Kushina and Minato's back.
"You can fly now."
"Oh!" Kushina's eyes shine brightly.
She instantly leaps in the air and spreads her arms like a swan ready for a flight.
Whoosh… whoosh…
Kushina whizzes through the air.
"It's so fun. I never thought flying would be so fun."
She turns to Izuna with an envious gaze.
"I am so jealous of you, Izuna-kun! You can fly whenever you want."
"Well!" Izuna silently scratches his head.
'I can teach you whenever you want. After your rebirth, your body and constitution have changed a lot. So, it's not impossible to learn Dust Release.'
"Yahoo!"
Kushina continues to fly around for a while.
Cough… cough…
Minato coughs slightly to get her attention.
"Kushina, let's get back to the work. We are doing it for the sake of Naruto, Remember!"
Whoosh…
Kushina immediately appears in front of Minato.
"Of course! I won't let anyone bully my Naruto."
Izuna flickers towards the village to gather material for the seal.
"Since it is a big project, I will request funds from the village. I don't want to pay the bill from my pocket."
Izuna summons a small eagle and writes down the list of material and sends it to Tsunade.
"Tsunade will look for these materials while I will search for some rare materials."
Whoosh…
Izuna teleports from his position. He reappears at Mount Myoboku.
"Oh! Izuna-boy! I have been waiting for you." Fukasaku walks out of his house.
"Here!"
He passes a giant scroll to Izuna.
"This is…"
"Great Toad Sage prophesied your visit. He also told us the reason for your visit. This scroll contains all the rare materials collected by Mount Myoboku over the past thousand years. I am sure they will be useful to you." Fukasaku throws a glance at Izuna.
"Also! You look a little different from before."
"Of course! I am handsome than ever." Izuna shamelessly brags in front of him.
Fukasaku narrows his eyes.
"No! On a second look, you are the same as ever."
He turns around and enters his house.
"Hey! What's that supposed to mean?" Izuna silently stares at the back of Fukasaku.
'Did this old frog roasted me just now? Never mind! I won't bicker with an old frog.'
Izuna pockets the scroll.
"Next destination! Ryuchi cave!"
Whoosh…
He appears in front of a large cave with many crossroads.
'Damn! That old hag messed up with my Flying thunder, Mark. I will imprint a new one.'
He enters one of the caves. After fifteen minutes, Izuna arrives in front of a large cave. There is a majestic temple inside the cave.
Hisss…
A large blue snake with light-green eyes slithers out of the temple. There is a giant scroll in its mouth.
"It has been a while, Aoda." Izuna greets the snake.
"I am doing well, Master Izuna."
Aoda passes the giant scroll to Izuna.
"The Sage asked me to pass this scroll to you."
"Oh! This again."
He turns towards the temple and yells.
"How did you know I was coming?"
"I can smell your foul scent from miles." The snake sage responds.
"Is that so? Are you a snake sage or dog sage?" Izuna chuckles.
"Brat! Get lost from here before I count to ten or else, I will even snatch that scroll from your hands." The Snake Sage hisses violently.
"Fine, old hag!"
Izuna grumbles and teleports away.
"Damn! This foul mouth brat!" The White Snake Sage bashes the walls of the temple.
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A/N:- Yomotsu Hirasaka stands for the slope to Underworld.
Ama-no-Ukihashi stands for the Floating Bridge of Heaven.
P.S.:- Ama-no-Ukihashi is also an original technique of mine. I just like to research whenever I name a person or technique. I want it to feel like Original.