Special Containment Procedures: 

SCP-106 is to be contained at all costs in a 10x10x10 meter lead box. Contact with SCP-106 is not allowed before prior approval by at least 2 thirds of all Council members. Any interaction with SCP-106 should be done in a high security facility, with at least 9 to 12 Mobile Task Force Units at the containment chamber at all times in case of a breach or power failure. In the case that SCP-106 moves or tries to communicate must be acted to quickly and swiftly in order to avoid any containment breaches. The containment box of SCP-106 has to be elevated with ELO-IID electromagnetic supports. . In case of a power outtage, the back-up generators are to be enabled as soon as possible. Further, SCP-106 has to be guarded by at least 4 members of the Security Department or from the Mobile Task Forces. When a test is occuring or any attempt of communications, all personnel (Science, Class-D's, Security) are to remain at least 60 meters from the containment chamber.

Description:
SCP-106 appears to be an elderly  humanoid, with a general appearance of advanced decomposition. The appearance may vary, but the "rotting" or decomposing quality is observed in all forms. SCP-106 is not exceptionally agile but has been noted to scale walls and walk upside down from time to time. SCP-106 is also able to walk through walls, ceilings and floors as long as they have an entry and exit point. Multiple layers of lead, water and concrete as walls have been known to slow SCp-106 down drastically by having multiple entry and exit points. SCP-106 has been known to be motionless for days, weeks and even months, usually this is the time SCP-106 is planning it's next escape. When SCP-106 moves, a containment breach is almost always going to occur. If SCP-106 breaches, a lockdown has to be placed immediately and the corresponding MTF unit(s) (Epsilon-11, Nu-7) has to be called immediately.
SCP-106 has been known to torment it's prey in a so-called "Pocket Dimension" where it takes all of it's victims, after toying with it's prey, which can be hours or even days, it will consume them or release them. Although survivors of SCP-106 are very unlikely, as the victims corrode while inside the Pocket Dimension. Due to it's corroding abilities and the abilities to go through matter, it has earned the KETER classification respectfully.