Per 
Item #: SCP-XXXX
Object Class: Safe
Special Containment Procedures:
SCP-XXXX must be locked in it's chamber at all times to avoid bio hazardus contaimination. While handling SCP-XXXX subject must wear bio hazard proof equipment. Item is avaible to only level 3 clearance and above. Containment chamber must be kept on a -3 deegres Celsius at all times. SCP-XXXX must be kept in a containment chamber made out of kevlar and plastic due to it's reaction to metalic surfaces. outer walls must be constructed out of tungsten, stainless steel and lead. In case of a containment breach, samples of SCP-XXXX must be neutralized.
Description:
SCP-XXXX is an organism similar to that of a fungus, yet there isn't any record of it existing as a species of fungus. It was discovered in ████ at ████ in 20██. SCP-XXXX is a highly dangerus bio hazard and if kept at low tempreatures it will enter it's sleep session and will not wake from it until the temperature raises. If not kept at low enough tempreatures SCP-XXXX will.start repruducting it's self. It is yet unknown how SCP-XXXX reproductes it's self as it's highy toxiciticy neutralizes any equpiment used for spectating microorganisms, with the help of it's cells that seem to be able to create corosion on metal to a such magnitude metalic surfaces will start collapsing. SCP-XXXX cannot destroy surfaces that are not made out ouf metal. SCP-XXXX could grow to a size to be visble to a naked human eye, with it's reproduction but due to high danger of containment breach, it is not preferable by the site managment. If contacted by human skin SCP-XXXX will enter it's body and will consume all of the subject's flesh tissue, however it will not be able to consume other types of cells within the human body. Samples of SCP-XXXX can be neutralized by placing them in an eviroment colder than -3 deegres Celsius, As it's cells's organs are frozen and cannot operate. Neutralized samples of SCP-XXXX have shown that it's cells use an undiscovered substance that contains oxygen which can cause corosion on metal in an instance. It is unknown why SCP-XXXX uses this substance automaticly without controling it or it has an intend for usage of this substance. Later discoveries show that SCP-XXXX does not use the coroded metal for repoproduction or source of food, neither does metal have any negative effects on SCP-XXXX. If consumed by a subject SCP-XXXX will be able to survivie the entire proccess of consumption and will attempt to consume the subject's skin tissue after the process. A single instance of SCP-XXXX can cause at least a cubic meter of steel to corode, which makes it difficult to contain, As standard plastic would be damaged in cold enviroments that SCP-XXXX must be kept in.
Addendum: SCP-XXXX has negative effects on all animal species. It seemes to refuse to consume any other human tissue than skin tissue but, on every other animal subjects tested, SCP-XXXX consumed the entire organism.