SCP-682, also commonly known as the Hard-to-Destroy Reptile and later as SCP-6820-A, is a major antagonist in the SCP Mythos. It also appears as a major antagonist of SCP - Containment Breach. It is an SCP object and one of the most well-known and dangerous objects captured by the SCP Foundation. It is a Keter class anomaly, the offspring of the Scarlet King, and is SCP-166 and SCP-999's half-sibling.