Animeverse Slayer!

Upper Moon Three never expected his sneak attack to fail, he was sure these slayers were asleep when he attacked. But they woke up instantly once they sensed danger.

Well, it didn't matter to him whether they were asleep or not, he preferred to fight them head on.

He crossed his arms to defend against Rengoku's attack. Taking a solid hit Upper Moon Three could feel his steel bones creak and bent.

What power!!

He dragged his feet through the compartment floor and smashed into the next one. Rengoku didn't want to let of the momentum.

Flame Breathing Fourth Form, Flame Tiger!

His attack took the shape of a flame tiger and pounced on Upper Moon Three.

Upper Moon Three took a step forward, a hexagon with pattern over it's body appeared beneath his feet.

He punched out. The flame tiger collided with his fist, the shockwave pushed the other passengers aside. Some of them struck heavily into the compartment walls and were bleeding.

Rengoku pushed on while he yelled back, "Inosuke, Zenitsu, protect the passengers. Tanjiro, stop the train!"

"Yes!!!"

As he spoke several demons broke into the compartment. Inosuke and Zenitsu cut them apart while Tanjiro ran through them towards the front.

Upper Moon Three blocked Rengoku's assault and drew his fist back. A silvery glow coated his fist as he punched out.

Rengoku met it with a strike of his own. The air shook as they battled.

Zenitsu was pulling out the other passengers while Inosuke took care of the demons.

Rengoku's attack met head on against Upper Moon Three. The compartment was torn down by their battle.

Flame Breathing Sixth Form, Scorching Bones!!

The ground beneath Rengoku's feet was destroyed and flew everywhere. Flame manifested from his sword as they swallowed Upper Moon Three.

Amidst the sea of flames Upper Moon Three raised his leg and kicked out like a torrent. The flames were dispersed but Rengoku was already infront of him.

Flame Breathing Ninth Form, Rengoku!!

Rengoku's sword descended on Upper Moon Three, flames covered his vision as he found no chance to dodge.

The hexagon beneath Upper Moon Three light up, he stomped his feet. Roaring to the sky he unleashing a fury of strikes upon the descending flame sword.

Boom!

The compartment was finally destroyed. Zenitsu and Inosuke grabbed rest of the passengers and jumped to the next compartment.

Upper Moon Three had a gruesome wound on his c.h.e.s.t, blood spewed out like a fountain. However the wound slowly closed up, soon it was gone.

Opposite to him was Rengoku who was slightly out of breath, his shoulder had a light wound on it and he was bleeding. His eyes focused on Upper Moon Three.

Just as he was about to move the train started to slow down.

Upper Moon Three frowned, he looked up front and saw Tanjiro's sword running through Lower Moon One's throat.

"Useless."

He spat out a single word and focused on Rengoku.

Now that the train has stopped Rengoku no longer needed to consider the safety of others. He bent his body and held his sword low.

Flame Breathing Seventh Form, Rising Phoenix!

His feet pushed off of the steel floor, it shook and trembled before deforming. Rengoku flashed through the air and swung his sword.

A flame phoenix screeched towards the sky and dove down. It's beak tore through the air and clashed against Upper Moon Three.

Bang!

Upper Moon Three was thrown back, Rengoku emerged from the flames and stabbed at his neck.

Using his foot Upper Moon Three dodged to the side, he crashed through several trees and came to a halt. His feet sunk deep into the ground, a glow covered his body as he jumped up.

Rengoku was already waiting, his sword swung down. Upper Moon Three dodged his strike and flew past him.

Once he was at a certain height, his body started to glow. The hexagon shape appeared above his head. He raised his leg and stomped it down. He shot down like a meteor.

Rengoku gripped his sword tighter. He could feel the threat from this move.

Flame Breathing Fifth Form, Flickering Flame!

Suddenly he was swallowed by a sea of flame that flickered in the dark.

Upper Moon Three struck down. The formless flame swallowed the incoming strike, it's flickering got stronger withe each passing second and finally dispersed with a bang.

Rengoku flew away with his body covered in small wounds while Upper Moon Three jumped back without an arm.

"You are just a breath away from the realm." Upper Moon Three suddenly commented.

Rengoku pointed his sword to the ground, "That's enough to burn you down."

Upper Moon Three narrowed his eyes. Both of them gathered their strength, this was the final move. With this a victor will be determined.

Upper Moon Three shot at Rengoku like a bullet. Calming his breath Rengoku took a slow deep breath.

Though his breath was slow the air howled and was s.u.c.k.e.d into the mouth in tremendous volume.

Flame Breathing Final Form, Ashes to Earth!

Upper Moon Three was a breath away from striking Rengoku's heart when an intense feeling of death assaulted his body.

He couldn't pull back, it was too late. Rengoku's flames were extinguished as a grey smoke covered his sword.

Upper Moon Three felt as if the world slowed down, his fist was cut into tiny little pieces. Next was his arm, then shoulder.

Rengoku was halfway through his attack, just a bit more and he could have cut off Upper Moon Three's head.

But it was at this moment he saw a shadow from the corner of his eyes. A faint sense of danger pervaded his heart.

Trusting his instincts Rengoku changed his sword and struck towards that shadow.

Bang!

His sword struck something, the strength behind that strike send him flying back. He was pushed off the ground, thrown into the air. Twisting his body Rengoku stabilised himself.

Looking in front he saw another demon with three pairs of eyes and sword strapped to his waist stand beside Upper Moon Three. What's eye catching were the characters engraved in his eyes.

Upper Moon One!