Soul Awakening Part 4

Their sword clash sends both of them flying. However, in the midst of getting flown back Akutenshi uses 6 slash attacks. Shoyo stops himself on the wall of a building which he bounces off of, cutting through the attacks and gunning for the vampire. Akutenshi halts the Hunter's advance with his red blade spirals. Shoyo deflects the first dozen but is hit with the next round, sending him crashing into the ground. The vampire loses sight of him for the next couple of minutes. He assumes he's planning a sneak attack so he gathers the spirals close to him to guard. Right as he does, Shoyo teleports and hits one of the spirals. He retrieved his alter blade and is now dual-wielding. He puts the hilt of the blade in his mouth, biting down on it, and teleports right under Akutenshi grabbing his leg and hurling him downward. Before he can reach the ground, he teleports again and attacks with both blades relentlessly. Akutenshi guards with his weapon before he flies back up and around Shoyo delivering a heavy kick to his back. But he instantly teleports behind him, his counterattack is blocked by a spiral. They have a back-and-forth zipping and teleporting through the sky, each attack leaving giant sparks of energy in their wake. 

"Haha.. Hahahahahahaha!!"

Akutenshi laughs.

"Hahahahaha!"

So too does Shoyo.

A burst of energy discharges from Akutenshi causing Shoyo to back away. His armor starts growing from his nape up, forming a helmet with horns that then closes off his face from top to bottom. 

"Ah yes. My full armor technique, I haven't used this since the Dark Age Era."

Akutenshi doesn't appear to have gotten dramatically stronger, but Shoyo can tell that he has.

"So you were still holding out on me. Well, so was I."

The golden aura around Shoyo bursts into a frenzy, like a radiant flame. 

"Tamashi no mezame."

With this phrase, the aura ceases and gathers to a singular point, Shoyo's right hand where he's holding the unknown blade. Golden marks appear on his forearms and across his body, even the color of his hair changes to that of his aura. A robe around his waist, flashy boots up to his knees, and a choker ornament materialize. He puts both swords together, fusing them into one for the duration of this transformation. 

Shoyo has no doubt in his mind that he is truly The Strongest.

"Marvelous. This has been a treat, Shoyo Kusakabe! Our duel mustn't end here. Let us continue on the final battlefield."

"I can't let you leave here alive."

"I didn't think I would leave you alive either. Here, a parting gift."

A spiral hundreds of meters wide opens up in the sky, accompanied by the intimidating sound of a trumpet.

"Babylon's Fate."

With a wave of Akutenshi's weapon, a massive blast shoots out of it. Shoyo teleports away, but the scope of the attack was unpredictable. It tore a massive hole in the ground, incinerating everything in all directions from it. Shoyo had no choice but to flee because within minutes, it had been completely annihilated. Island 86 has been wiped off the face of the map.