In Japanese mythology, the one who cut down the eight headed serpent, Yamata no Orochi was…
Susanoo no Mikoto.
*clash*
Tyger grew black wings of hell energy. Yamato shot a stream of green fire but Tyger made another hell energy shield;Yamato ran up to him and swang Calamity into his shield and broke its guard! Tyger teleported ontop of Yamato and hurricanrana'd him!
A sword appeared in Tyger's hand out of nowhere.
Yamato: is that Kusanagi no Tsurugi?
Tyger: So you do remember. The blade I used to "end" myself.
Yamato: Why Susanoo, why must you be a Forsaken One..
Tyger: THE NAME IS TYGER!
He wrapped the Kusanagi in lightning and had a swordfight with Yamato. As they fought, the clouds were moving faster and the storm was a mix of the Golden Lightning of Susanoo, and Yamato's Green Lightning.
Tyger jumped on Calamity and curb stomped Yamato; The plane started shaking even more!
Yamato grabbed Tyger's leg and lit it on fire for a split second, enough for him to get up.
Yamato: Ha, you're lucky we aren't fighting on the water, because then I can fully manifest my serpents. Well then, I guess this'll have to make do.
Destructio 50.
Yamato summoned the legendary serpent with eight heads and tails, but minimized heavily because it can only be fully manifested in waters. Which is why Itsuki sent Yamato to Kanji Beach instead of anyone else.
Yamato: Go after em, boys.
The serpent flew full speed towards Tyger; He cut off a few heads but they instantly regenerated. The serpent started to eat parts of Tyger with almost no effort. Tyger exploded of lightning and the serpents dissipated, and the plane shook again.
Meanwhile in the cockpit..
Kotodama: Stay calm pilot! We're only 15 minutes until we arrive at Kanji City.
"15 more minutes until the touchdown on Kanji City" the pilot said on the intercoms.
Kotodama: Mazoku, Negiro, Ichiro and Kaito are you all alright back there?!
Me: Yeah, we're just resting a little while!
Negiro: I wonder how Yamato is holding up against Tyger…
Meanwhile, ontop the fuselage..
Yamato and Tyger have an airborne fight! Tyger uses his wings while Yamato surfs on his serpent. Tyger shoots many waves of hell energy towards Yamato, but he dodged around all of them and cuts off Tyger's arm with Calamity, and he yells in pain, but he still keeps fighting.
Tyger: Remember who I am, Orochi.
Tyger summons a lighting and hits Yamato's stomach! He spat out blood but he eventually got over it and made a spear made out of green fire.
Yamato: Remember who I am, SUSANOO!
His eye flared red and he threw it with all the strength he could while surfing his serpent. It pierced through Tyger's heart and it pushed him all the way back directly onto the plane; and it made a hole on the fuselage.
Meanwhile, inside the plane.
Negiro: Where'd that hole come from?!
Ichiro: I don't know, but it's making the plane shake like hell right now!
Kaito: Are we going to even make it out here alive???
Me: As long as Yamato is alive, I think we probably will.
Pilot: 5 minutes until our landing in Kanji City! Stay calm everyone, we will get through this.
Me: You hear that? Only 5 more minutes until our suffering stops.
Back on the top of the plane..
Tyger and Yamato are both limping a bit and look like they're about to fall over.
Tyger: Our final stand..
Yamato: Is now.
They both held their swords with one hand.