SCP-076 is a Keter-class anomaly comprising a black speckled stone cube (SCP-076-1) and the dormant humanoid within it (SCP-076-2). Once awakened, SCP-076-2 — "Able" — pulls bladed weapons from a dimensional rift and kills every human in range; even when slain in its rage state, it putrefies and reforms, returning to life. It is marked by a lean Semitic appearance and arcane tattoos covering its body.
The heart of the horror is violence that does not end. Before a being that revives after being killed, containment is not a permanent seal but only a brief reprieve. In revealing that human control is ultimately temporary, it shares the horror of threats that cannot be exterminated.