Haru grit his teeth as he caught his sister's Sage enhanced punch by the wrist. He didn't want to do this.
He really didn't want to have to do this! Not against HER, not against this loser!
He refused. He refused the very idea that he could lose to this pathetic excuse for a ninja with zero style. I mean honestly, an orange jumpsuit? And yet here he was being forced to go this far?
"Fucking hell. I'll never let myself live this down." During his whole inner monologue Haru was gathering energy. The widening of Naru's eyes told him that the purple aura had appeared. "Surprise bitch!"
Naru, struck-dumb at the sudden reveal, was unable to block the sudden palm to the solar plexus that robbed her of all air followed by the brutal kick to her temple. Dazed and confused didn't even begin to describe her state of being before pain exploded from all points of her body.
Haru laughed maniacally as he drove his Rasenringu into Naru's chest. "Time to die, Naru!" He then angled his arm down and tossed Naru down the mechanized training ground they were fighting in.
Blood and spittle flew from Naru's mouth as the orb of darkness mercilessly shredded apart her chest, her Sunjutsu enhanced physic being the only thing keeping her from being instantly torn apart by the technique. So that's what it feels like to be on the receiving end of a Rasengan...
It was only on her way down that Naru noticed her body feeling sluggish and her chakra being unresponsive. "Wha...?"
Then suddenly a spike protruded from her chest having pierced clear through her back, her body slowly sliding further down the bloody spike. Naru knew she should have been panicking and trying to get herself out of this predicament but she just felt so tired.
Her arms wouldn't respond... She couldn't feel her legs... and her eyes. Naru blinked desperately but they just wouldn't stay open. Haru landed on the spike across from her with a triumphant laugh.
"So this is what was making me so uneasy." Haru muttered to himself as a bubbling cloud of red chakra leaked out of Naru attempting to close the wound. "Kurama, now!"
"On it."
Haru prepared to absorb the half Yang part of Kyuubi's chakra his sister possessed before remembering the scroll. Quickly rummaging through Naru's pockets, Haru found his prize with a grin. "Ah! Perrrrrfect."
"Be quick. He's coming."
Settle down Kurama, just focus on absorbing the chakra, I'm reading as fast as I can! Haru mentally answered as he pored over the scroll. It was fascinating and explained a bit about his mysterious chakra but until Kurama was complete he couldn't actually put it into use.
I'm ready, Kurama. You finish up, I'll deal with the masked asshole.
"Got it."
"Well done Haru." A deep voice called out from behind him.
"Madara." Haru replied with a nod. "I hope you don't mind, I helped myself to the feast before me." He indicated at the chakra being siphoned away from his sister's dead body.
"Of course not, that was the point of bringing Naru here in the first place."
How much longer?
"A few minutes. Keep talking."
"So this made for some good reading." Haru said as he held up the scroll. "Have you read it?"
"No I haven't." Haru tossed over the scroll upon Tobi's admission. The man studied the wooden scroll for a moment before opening it. It was the tale of the two brothers only in this version Hamura stayed on earth, not Hagoromo.
Asura and Indra also were never born, only Hamura's daughter Yaksha who apparently suffered from dual-personality and was known to be sweet and inoffensive some days then dark and murderous on others.
Her heirs were known for being able to draw in the power of the cosmos, radiating in a deep purple aura as a form of cosmic senjutsu. It also held absolutely no knowledge on how to break the genjutsu so it was effectively worthless aside from a small history lesson. "As interesting as that was, I believe it is time for me to claim my prize as well."
Tobi was not unaware that Haru had just finished absorbing the rest of the Kyuubi's chakra which was fine by him to be honest. Hypnotizing one larger Kyuubi would be easier than trying to entrance two smaller ones at the same time.
"Yeah, see, here's the thing. Fuck you and your whore of dead girlfriend." No longer bothering to hold back Haru instantly entered Cosmic mode and launched a senjutsu enhanced Rasenringu at Tobi who disregarded the attack completely as pointless while in his intangible form and allowed it to pass through him.
Big mistake.
Obito was flung back, chest being shredded apart as the cosmic enhanced jutsu tore at his flesh. He was almost thankful when his body hit the wall and the jutsu detonated. The Zetsu parts of him slowly melted away as the jutsu somehow disrupted the chakra holding him together.
Haru laughed mockingly as he floated over to the dying Uchiha. "You stupid arrogant prick, did you honestly believe I would just lay down and die for you? Tsk. tsk."
Obito growled as he focused on the purple aura completely covering the Uzumaki. Somehow it allowed the boy to fly or at least float somehow. "H-How?"
"How?" Haru tilted his head in mock confusion "Oh! You mean how did I hit you? Oh, well that's easy. Not even your fancy little sharingan techniques can stop cosmic energy, trust me I've tested them on Sasuke."
"Co-Cosmic?" Obito coughed out, feeling the blood splatter inside of his mask. Without the Zetsu parts his body was failing rapidly and for whatever reason he couldn't teleport out or end the jutsu. "Wait..."
"Ah, yes! Cosmic energy, marvelous stuff, works like nature energy according to what I've learned about nature senjutsu. Only instead of trying to fight off the world's malice you need to survive entirely ridiculous levels of radiation. Honestly if I wasn't both a descendant of Yaksha and a Jinchuuriki, I likely would have died just attempting to enter Cosmic mode." Haru obliged. He always wanted to do an evil villain monologue after securing the win, so far it's pretty fun.
Haru's face became mischievous as he reached into his tool bag. "Just between me and you though, I had a cheat code going into it." From within the bag he pulled out something round covered in a black cloth. "See when I was a kid, I went on a mission. I was supposed to help some people or something, I dunno, not important. What was important was when I laid eyes on this."
Obito watched as Haru unfurled the cloth and sitting in his palm was a purplish glowing rock. "This baby is a meteorite that landed on Elementia some 200 odd years ago. Those greedy bastards in the Hidden Star Village meditated around my baby and simulated senjutsu by drawing cosmic power from it. Anyway as soon as I entered the village I was drawn to it and when I first saw this magnificent specimen I knew I had to have it."
"So... you stole it?" Obito wondered, this time he was the one stalling for time.
Haru laughed "Stole it? Heavens no! I waited until the guy trying to steal it showed up, see he did most of the dirty work for me and got rid of most of the jounins left. So later after I killed his ass, I waited until the remaining Hoshi-nin were asleep, finished them off and took it for myself."
Obito was starting to fade in and out of consciousness but he knew that Haru had gotten closer. "Now getting to how all of this relates to you. Cosmic energy has this really neat side-effect of essentially poisoning you. The foreign chakra-radiation turns even the best chakra control to shit the first couple of times you're exposed to it and you sir, just got a Rasenringu full of the stuff."
Obito's lone sharingan eye glared balefully at the blurry purple object, no longer even clearly hearing his killer's words. "But best of all!" He knew he was dead, it was only a matter of seconds now but he felt it. The majority of the radiation melted away with Zetsu's body parts.
"Y-you..." Haru stopped mid-way of his closing speech when he heard Obito's voice.
"Eh!? Speak up there buddy, I couldn't hear ya!" He mocked, leaning in close with his hand cupped to his ear.
"You... talk... too much." Just then Obito's eye activated and he let himself slump forward, tapping Haru with his forehead. That was enough to activate his Kamui with his dying breath and send them both somewhere, anywhere, as long as it would kill them both.