Per 
Item #: SCP-XXXX
Object Class: Safe
Special Containment Procedures:
SCP-XXXX is to be kept in storage at site ████ in a 2 x 2 meter solid metal cube with a fitted latch on the top. The inside of the holding container for SCP-XXXX is to be fitted with a wireless barometric air pressure sensor (BAP) to monitor SCP-XXXX presence and rely it status to site research personnel.
Movement of SCP-XXXX holding container is only permitted with the approval of 2 level 3 researchers.
SCP-XXXX holding container is only be to moved with an automated drone set at a speed of 0.1m/s.
Description:
SCP-XXXX is an invisible mass in the shape of a perfect sphere, with the exact diameter of 6cm. SCP-XXXX can ███████ wavelengths of light on any known spectrum, SCP-XXXX can be viewed directly with SCP█████ however this results in SCP-XXXX to enter it's active state.
SCP-XXXX's inactive state appears to be random movement through levitation, the source of the levitation is unknown, but can be effected by natural air flow. SCP-XXXX has an aversion to intentionally touching any solid objects.
The only way to detect SCP-XXXX location and rough direct of travel is with a barometric air pressure sensor inside the holding container, other detection methods have proved fruitless and often resulted in SCP-XXXX entering its active state and proceeding to breach containment. While contained it is possible to move the holding container SCP-XXXX is located inside, but movement must be done with extreme precession ensuring SCP 5540 doesn't come into contact with it's surrounding container.
SCP-XXXX enters its active state when it is forced to touch a solid object, SCP-XXXX will target the individual ultimately responsible, regardless of intervening layers of abstraction or automation. SCP-XXXX's target, now referred to as SCP-XXXX-1 will be pursued by SCP-XXXX until SCP-XXXX-1's death. No known material has been able to contain SCP-XXXX while it is in its active state. When activated SCP-XXXX will take the shortest possible route to SCP-XXXX-1 while avoiding contact with solid matter where possible, if SCP-XXXX has no other option it will pass through any solid object in the way leaving a 6cm diameter hole.
Once SCP-XXXX has reached SCP-XXXX-1 it will acts as a fatal tripping hazard at opportune moments. SCP-XXXX has displayed the ability to wait for the precise moment where a trip or fall would result in the death of SCP-XXXX-1. This suggests that SCP-XXXX has a degree of sapience. While SCP-XXXX is in it's active state, if another individual comes into contact with SCP-XXXX, it will result in that individual becoming a target after the demise of the preexisting target, SCP-XXXX appears to queue it's targets in the order of contact. It is unknown how SCP-XXXX is able to track the location of its targets.
Discovery:
SCP-XXXX came to the attention of the SCP foundation after a series of fatal accidents at site —-.
All those who were initially involved were part of MFT MU-13 (GhostBusters). All accidents occurred after the retrieval and containment of SCP ████ at site —. The deaths were initially thought to be part of SCP ████ anomalous properties, as all member for MU-13 (Ghostbusters) had come into contact with SCP ████. But once research personal started to become victims of fatal accidents, site ████ was placed in lock down and the reminder of MU-13 (Ghostbusters) were deployed to sweep the facility. SCP-XXXX was found with the help of Doctors ████ and ████████.
SCP-XXXX anomalous properties were discovered when attempting to find a way to contain and move it to a more secure containment facility.
