SCP 2439 is a Keter Class anomaly also known as The Missing SCP. SCP-2439 is an idea that infects people who know about it and takes over their mind slowly. SCP2439 is some ancient mind from an alternate dimension (we think) that’s trying to get into ours and take over. It's smart so it'll spread around the Foundation real quick if it gets a chance, which is why this is scratched into this wall away from cameras: KILROY WOZ ERE This video, being derived from https://scp-wiki.wikidot.com/scp-2439

The Chaos Insurgency is an organization that stands in opposition to the SCP Foundation. Originally founded as a covert black ops special task force, the Chaos Insurgency now uses anomalous creatures and items to further the mission and goals that are directed by its mysterious leader - The Engineer. This video, being derived from http://www.scpwiki.com/chaos-insurgency-hub and released under Creative Commons Sharealike 3.0. | SCP Declassified