[A/N: The main character will not have any knowledge of DC he lived his whole life in the towers]
Location: Justice League Tower
"Alright, we are all here, so tell us, Batman, what happened?" Superman asked
"A new disease is spreading. I'm yet to figure out what it is. But what we observed from someone infected is that it makes them act insane. They lack care for their own lives, and they scream as if in constant pain," Batman explained as he pulled up images of a person with white and purple markings covering half their body.
"I have never seen anything like this...and nothing is in my database about it," Red Tornado added.
"I'm guessing that's not the only concerning thing?" Flash asked
"No. There is one more thing: they can't be harmed. I attempted surgery on one to find the core or cause, but no matter the metal I used, it could not cut through any part of them that was infected. I even tried laser surgery, but that only left their skin hot to the touch," Martian Manhunter explained.
"I see that is a problem...tell us, how does it spread? Wonderwoman asked
"We don't know when we found this person; it had attacked others, but only a few of them had been affected, and to make it worse, three people without any attack wounds became infected," Batman explained.
"Then this may be magic, or someone deliberately choosing who to infect," Wonderwoman added.
"For now, we should all watch for any people showing signs of infection. All we know is that this thing makes normal humans almost as durable as Superman or Wonder Woman with the sanity of a wild dog," Green Lantern said
"Hale is right, we need everyone on lookout. If you know anyone who deals with diseases, curses, or anything of the sort, contact them. We need to stop this before it spreads," Superman added.
[Warning! Warning! Warning!]
[Riots have begun in Metropolis]
"Riots? Why?" Superman asked
The next moment, the large computer in the center of the room began projecting people attacking each other. Those attacking have the same affliction as those affected.
"H-how, so many people at once. Everything was fine mere moments ago?" Wonderwoman asked
"We can worry about the how later. For now, we need to contain this," Superman said, standing up.
As the rest of the league followed behind, Batman continued to watch the screen with narrowed eyes.
(How is this possible. A disease with no origin, no spread pattern, and some known symptoms spreads with such speed)
...
In the middle of Metropolis as chaos overtakes. With hundreds of people attacking each other and the screams of agony filling the air, the knight donned in black armor stands in the middle of it all.
"The blight is spreading fast...but there are also sane humans here. If I want to deal with it all now, I don't have time to worry about their safety," the knight spoke, clenching his blade.
"People of this world, I am sorry. I do this with a heavy heart," the knight said before dashing forward.
With quick, almost invisible slashes, he cut down those infected with the blight, putting them out of their misery.
As he cut down more and more, the other infected with the blight stopped attacking others, and all began charging at him.
"Good, gather up just like that," The knight spoke
Lifting his fist into the air, the knight spoke a single word that was unlike any other language. With that word, a cross star symbol appeared over his fist and began glowing with a bright blue light.
As the blight approached, he slammed his fist into the ground. This punch caused the light to release a shockwave of light and energy, engulfing the infected in a blue flame that burned them to ash.
"Ha, there are still too many, I don't want to use them, but I might have to," the knight spoke, releasing a deep breath.
Charging forwards, he continued to cut down each of the blighted while dodging the humans. With each cut, he seemed to get faster, cutting down more and more. Within a matter of moments, he had become a blur, cutting down the remaining blighted in a moment.
"Damn it seems the wound still hasn't fully healed," The knight spoke as he held his chest
(Del commence the scan)
[Scanning...]
[1 blighted a 150-meter north]
[★★: Corrupted Human]
"A two-star human...Nothing to worry about," The knight spoke, standing up straight and making his way north
But before he could get a few steps in, he was stopped.
"You there, wait," a voice spoke behind him.
Turning around, the knight saw a group of people all dressed in different ways that made them look silly in his eyes.
"Who are you?" a man dressed in black clothing asked him with slight aggression in his voice.
Staring at the group briefly, the knight sighed before continuing forward. But he was stopped again as a man dressed in red and yellow appeared in front of him at incredible speed.
"Look, stop for a moment, we have a few questions to ask you," the man said in a calmer, friendlier tone.
"I have something to do. If you wish to ask me a question after, that's fine, but don't get in the way of my mission," the knight spoke before walking past the man.
Clenching his sword, the man threw it north toward the infected. In the next moment, he had disappeared before the group. Appearing in the sky next to his blade, he grabbed it and looked down to see a human with four arms and two wings attacking others while screaming in agony.
"You may rest now, I will take away your pain," the knight said as he came down on the infected, cutting it in half without any problem.
[No more corrupt in the area]
[You have stopped the initial spread]
[You have slowed the corruption rate by 2.6972%]
"Good, that will give me some time to find the source," the knight replied
Walking up to the body of the corrupt, he placed a hand on its body and spoke.
"May you live happily in your next life,"
"Will you answer our questions now?" a voice spoke behind the knight.
Turning around, he saw the same group from before and could not help but sigh.
"Very well, what do you wish to know, humans?" the knight replied in a cold raspy voice