SCP-173

SCP173 is a Euclid class SCP and the very first being created by the SCP Foundation. It has the ability to move at very high speed and can snap the neck of any life form. He is the main antagonist in SCP - Containment Breach.

About
Origin is as of yet unknown. It is made of concrete and rebar with traces of Krylon brand spray paint. SCP-173 is animate and extremely hostile. It cannot move while viewed directly and must not be broken. Personnel at the minimum of 3 are assigned to enter the container and are to alert one another before blinking. It is reported to kill its victims by snapping the neck of any human it encounters. Personnel report sounds of scraping stone within the container when no one is inside. The reddish brown substance on the floor is a combination of feces and blood. Origin of these materials is unknown but must be clean.