Third in my SCP Foundation series, we have SCP.106, AKA The Old Man, a horrific, monstrous being that exists inside a dark pocket dimension, but can teleport through portals of blood and gore into the real world to hunt it's prey. Despite lacking any actual need for sustenance, The Old Man is a sadistic monster who derives pleasure from it's prey and can only be contained with the promise of fresh victims, the younger, the better. If needed, the SCP Foundation will harm innocent people, causing painful but not lethal injuries, just to draw The Old Man back towards containment.