somthing that is not explained but should be in backstory (I had planed to make a younger him profile when I first made this but I never did it was going to go there.) Is that he attained his many powers from defeating the creepy pasta's themself in what is Called the game.
A mail man (away the same man) would send a package once it is opened the game would start. The item was away related to the creepy pasta or belonged to them (if jeff it may be his knife if someone related to slender man it maybe a note) "winning" when you first open the package is rather simple.
You only need to destroy what's inside and time would roll back to before you open it. Only no one ever tells you to do that. All anyone would ever have is a vage warning from the mail man that's IF the person who the package is for comes to get it.
Otherwise they have no idea It's not a fair game no one was ever ment to win. It was just entertainment for the higher ups as is the game being played in the story under summary granted that's a bit more elaborate then normal.
C did win. I'm not going to reveal why until I do get around to making his younger self's profile however. His first was against Jeff. And when the knife was smashed time rolled back. Only HE remembered he suw his family killed around him. He wanted to forget but he couldn't, because it started again. He wasn't the one to get it this time it was his Neighbor that got the package. Of a DVD for the legend of zelda magera's mask. (You see where this is going also his neighbor was like 4 a little little kid well he was about 12....so ya.)
And that is where his powers came from. (mostly)