•The Assassin's Teacher• ((Saiki K. x Assassination Classroom Crossover))

Unwanted Visitor.

With Saiki (Limited)

A large black claw came out of what may just be thin air and went smashing towards Koro-Sensei, piercing right through him, through his heart, and a smile was still on his face.

Saiki gasped to cough and now wasn't sure what was really going on.

The Earth seemed to lose all sound, as nature they were all so very surrounded by and background music went to a muted faze, no student seemed to have time to even create a scream at the suddenness.

The dark claw soon snapped back to the ringer, as another, and already hated and a shrill voice came through from a man that snuck in the darkness and waited to kill, at a vulnerable time like a true, bloodthirsty assassin, who had zero moral compasses to lead him. (And as much Saiki looked up to that, he had no time or respect towards the man to fanboy about the latest attempted murder.)

"And many more," he bitterly and sourly sang the unfinished ending, as he came out of the bush's shadows, wearing all white, and looked different to the black background of night, he seemed to be trying to play in the role of a saint, or of a cult leader or a hated man that all the people currently with him hated dearly, ('That last one fits quite an on-point' )

The students snapped their heads to the man named Shiro in shock, Koro-Sensei seemed okay for the most part, but the students were all but not of the emotional traumatization this man had just inflicted.

"Shiro..." Terasaka who was closest to the man grunted in disrespect.

"Yanagisawa," Koro-Sensei called him by a different name but with just as much bitterness placed into his voice as Terasaka's.

"The hour is upon us." the man in all white said, with his high edged voice. "So then, permit me to give you a gift, the gift of the world's severest and cruelest death yet." as a zippered voice, went out into the night time sky, and beady yellow eyes peered, but nobody was seen yet.

"Hello, there." the voice--the creature said, "You do know who I am?" he asked as his voice seemed to change drastically, "Do you not sir?" the voice was very low, and it seemed to be like a monster with slime down his throat talked to them.

Koro-Sensei gave off a few beads of sweat and a nervous exhale, towards the direction of the new being. "Let me introduce him, for the sole benefit of your students, and the now broken pawn you call a co-worker," he said that way to happiness, as Saiki stood in place with one crutch, no visible sign of emotion anywhere on his face but a clenched fist in his hand, the hand closest to the vital case, just in case.

"This is boys and girls," he said now completely ignoring Saiki and his existence that tended to not go unnoticed by the fact that he was the tallest 'student', the 'student' with the brightest hair and strange appearance, and the 'student' with a kind of fucked up life right now.

"Is the pupil who stole the name of the Reaper from your teacher," Saiki couldn't even help himself but gulp down the saliva he had gained from this chilling new Reaper, the creature in a human-looking like a shape stepped up, "And as of today..." the man held for a dramatic and spine chilling pause, as a crash went on.

And the students looked up, Saiki was wrong, it did not have a human-like body, not at all. "I take the liberty of christening him the new and vastly improved, Koro-Sensei!" the creature had multiple tentacles and was larger than what one could imagine, as the (what Saiki thought) once human seemed to grow as large as the barrier itself, and the monster breathed horrendously, with smoke coming out of his mouth like a dragon.

The night time itself seemed to darken under this inhuman presence that must have once been an average life at some point.

It wasn't helping at all, that Koro-Sensei was whimpering in fright and more sweat of fear rolled down the side of his round yellow face. Saiki thought best and took it to himself to move all his students behind the teacher, just to keep them safe from what might be the equal death they'd meet as their teacher would.

As what might be horrible flashbacks took place inside the teacher's head rather than what was currently going on, this new creature seemed to have a past with Koro-Sensei, as Saiki could tell in the posture he had, the same posture he had when telling the story of when he became the Reaper in the first place to Kaede's sister's death, when Kaede acted out in longing of blood for her bloodlust when Saiki was still wheelchair-bound.

"What's that?" Yoshida asked an undelightful question when the large monster jumped through the air and landed swiftly and effortlessly on the entrance roof of the E-Class location. "No seriously!" he said, as Saiki gave him a side glance while trying to keep his eye on the moving creature. "Oh, crap!" as the Reaper breathed out wildly.

"Okay," Muramatsu was trying to calm himself down by breathing deeply a few times, failing now, as he looked at the dangerous creature humans created (The same humans Saiki would die-- pun intended-- to kill) "Okay," Muramatsu tried to speak again, "Before it was just his face, but now his entire body freaks me out to hell!" he yelled over the monster's (Reaper 2.0) heavy breathing.

"He underwent the same modifications as your precious Octopus," Shiro said, not so kindly for the information any person could puzzle for themselves. "With one difference,"

'No duh, we aren't blind.'

Shiro stepped ahead of the Reaper and in front of the E-Class members, hands in his sleeves annoyingly the hell out of Saiki with that usually glossed over the stupid move.

'I hope you trip and have no way to catch yourself,' he directed to the man ruining his life right now.

"Quite unlike Itona and my would-be sister-in-law,"

'Don't say it like that, you sound weird...like Pervo-Sensei--Iguchi-Sensei, I meant.'

"Be begged for them, far be it from me to judge, but I think that puts him a cut above. I know! Wrap your head around that. A man able to overwhelm you in human form now possesses unlimited power. Tentacles fueled by pure hatred. Can you imagine?" He spoke like an infographic ad.

The creature then lunged forward dangerously to the ground.