Calvin Lucien was a Chaos Insurgency agent with a grudge against The SCP Foundation, believing that taking them out would release the hold that the organization has on the anomalous, thus saving the world from their tyranny.  He has the Godless Spear, which nullifies immortality of gods or even taking away their power no matter how strong they are, allowing him to kill all gods. It was implied that Death itself steered him from the hand of fate, making him unable to die or harmed regardless