Yo peepsicles, Imma back and this time I have a special skin: SCP-173! If you have played SCP Containment Breach, you know who "he" is. However, if you haven't played it, watched videos on it, or heard of the game at all, then get your butt over to Markiplier's channel right now! It is an A-MAZING game!!!!! 
SCP-173 is basically a being of unknown origin, who is made of concrete and rebar with traces of krylon-brand spray paint. It is mobile and extremely hostile. SCP-173 can not move while in a direct line of sight. However, when not supervised directly, it will move VERY quickly to a human being and attempt to kill it by snapping their neck at the base of their skull or by strangulation. It can even move when someone blinks, even if they had been looking at it. So he is a force to be reckoned with. lol
Have fun murderalizing people! :D

Also, be sure to check out the SCP Foundation's wiki! It is where all the SCP stuffage comes from. Link here: http://www.scp-wiki.net/ (if you want to see the list of at least 3,000 SCP's, go to the SCP database series.)

P.S. Stuffage is awesome.