SCP-106 - Official SCP: Unity Wiki

SCP-106, or "The Old Man" is a keter class SCP and a prominent antagonist of SCP: Unity. It was added in version 0.5.0. SCP-106 appears to be an elderly humanoid, with a general appearance of advanced decomposition. This appearance may vary, but the “rotting” quality is observed in all forms. SCP-106 is not exceptionally agile and will remain motionless for days at a time, waiting for prey. SCP-106 is also capable of scaling any vertical surface and can remain suspended upside down indefinitely.

SCP-106 - Official SCP: Unity Wiki

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SCP-106 Size Comparison : r/SCP

SCP-173 (Unity redesign) : r/SCP

Original SCP-173 and SCP-173 Unity remake going on a date. : r/SCP

Steam Workshop::[FR] SCP-RP Abbadon Commuity

Scp Unity Breach - Colaboratory

So the scp, cb Unity version of 106 is terrifying

The Old Man is Hunting You - SCP-106 WW1 EAS Scenario