SCP-106 is able to “vanish” inside solid matter, entering what is assumed to be a form of “pocket dimension”.

SCP-106 is capable of passing through solid matter, leaving behind a large patch of its corrosive mucus. This is observed as rusting, rotting, and cracking of materials, and the creation of a black, mucus-like substance similar to the material that coats SCP-106. SCP-106 causes a “corrosion” effect in all solid matter it touches, engaging a physical breakdown in materials several seconds after contact. This appearance may vary, but the “rotting” quality is observed in all forms. SCP-106 appears to be an elderly humanoid, with a general appearance of advanced decomposition.