I was kinda disappointed with Jacks Anti thing, so I wrote this! Also Holy crap we hit 12K Reads, woah! Thank you (: Plenty of Anti stories coming up and feel free to leave requests. 

 Jack started his video, a odd feeling in his stomach; it wasn't nervousness, it was dread. He knew tonight on Halloween that something bad was going to happen. He could feel it in his bones and the very bottom of his soul.
Shaking it off he carried on, being goofy as usual but now and again he would stare at his knife in perhaps fear and wonder. It was sharp and shiny, the blades felt nice against his fingers, the feeling sent shivers down his spine and he hated himself for loving it.
He finished carving his pumpkin which looked just as goofy as him. He paused picking up his knife, the Irishman's reflection in the blade his wicked smile prominent. He raised the blade to his neck, cackling. This wasn't Jacks actions, no. It was something he couldn't control, something that was finally free to take over this body fully, after years of trying. Jack had managed to control it until now, he wasn't strong enough this time. The knife went across the hosts neck, drawing crimson liquid and then came another laugh.
"This body is WEAK. After all these years, I'm free." The blood spurted from the neck, it turning green and Anti smiled. He then remembered that during the night he was able too lock up Jacks roommate, the action making Anti weak which almost ruined his chances of full control. Dropping the knife with a clink, he reached into the closet; a red headed man with duct tape around his mouth and eyes full of panic, one of which bruised stood in it. The Irishman smirked ripping the tape from his experiment.
"Jack-"

Before Mark got to say anything Anti ran his fingers over his green septic blood and wiped it across the Americans lips, silencing him as he began to twitch.
The once panic filled brown eyes turned black and empty and Anti smirked, it had worked.
"Untie me." The darker Mark snapped.
"Easy there Darky. I make the rules~" To this, Dark hissed, although he liked the nickname, it fitted well.
The thing that was in his system was a virus, caused by Antis septic blood it worked only for a few hours but it was enough. Once it wore off, people would want more, like a drug - it infected them and Anti wanted to infect the world.
He untied the man in front of him admiring his work, he had turned a good soul into an empty heartless human whom in a few hours would be just begging to be infected and Anti adored that, he want to see this man plead for some of the virus. He'd give him it too but no one else, he'd just let them die. Oddly, he cared for the red headed human in front of him.
Grabbing Dark, he hissed into his ear.
"Infect everyone you can and you'll get more virus if you're a good boy." Dark smirked, showing his teeth and walked off.

After being trapped in a cowards body, someone who wasn't ever in charge; Being in charge of somebody who could crush Anti in a heartbeat made him feel powerful.
Before Anti knew it, his little minion had infected the neighborhood and came back on his knees his eyes flickering between dead and alive, empty and not.
"Please I- I need more." Dark or Mark said, his voice breaking.
Anti smirked, he'd brought this manly man to his knees all from the slightest bit of virus.
"I didn't hear you, say again?" Anti cooed.

"V-V-Virus, please Anti" Dark particularly cried, Anti repeated his actions from earlier running his thumb over the substance still leaking from his neck and whipping it over the Americans lips smugly.
Within moments Dark was back and shook it off.
"Don't ever tell anyone about that." He snapped, Anti would have pushed his luck if business didn't need to be done.
Heading off, they began spreading the virus. Killing thousands and keeping certain people who had strength alive to gather an Army. Anti was a walking virus and Dark his little minion.
-
Anti had his little kingdom, infected humans doing as they were told and in return Anti would give them a drop of virus. Dark was his second in command and every now and then he'd let him beg for a little longer because oh god did Anti enjoy watch him om his knees pleading and be adored the face he made when Anti gave in, giving him the virus.