Simple, someone posts a picture of someone, it could be a movie character, TV show character, video game character or just some random guy you find off of Imgur, then you post a picture of someone you think would beat/kill that person in a fight.
You cannot post characters that are invincible/cannot die in whatever material they come from. If you do, don't be upset if someone posts after you.
If you want, feel free to post how you think your character will whip the above character.
And remember to have fun! :D
I'll start.
