Item Number: SCP-XXXX
Object Class: Safe
Special Containment Procedures: SCP-XXXX is to be kept in a 3 meter by 3 meter, square opaque room. The room must have no vents or and open areas. The can only be viewed by personel under allowance by class 4 personal. Anyone who enters the room must be equipped with a gas mask, of course unless a class 3 personel says otherwise with permission. If SCP XXXX-1 escapes the room, the 6 rooms adjacents room must be quarantined and the people must have medical exams by Dr.████████, if he is not present, they must be quarantined at site ██. After 145 hours of any subject breathing in the gas, must be terminated.
Description: SCP-XXXX is a sandstone block with a width of 45 centimeters, height of 67 centimeters, and thickness of 15 centimeters. On the front side of the block, a small, red painting of a man with both of his hands raised above his head, the painting itself is dark red. The tablet itself is pale yellow in color, with very little imperfections in general. The cave painting is very straightly cut compared to other primitive drawings. As well, no other cave paintings have been found in this area, or primitive being fossils in general. When in contact with by any Mammalia or amphibian that releases Carbon dioxide as from a byproduct of breathing, the small red painting will begin releasing gas that has been identified as [DATA EXPUNGED]
Any human and/or creature who breathes this vile gas will begin hyperventilating for the first 5 minutes, after that they will stop hyperventilating and will appear to be psychically within standards. After 35-48 hours the creature, no matter intelligence, will begin scratching at it's own skin. AFter 64-72 hours, the creature will experience blackening of the pupils, the creature then begins to let off a radio signal that can only be heard by radios with a signal strength detector of ████ V/m. The radio signal has been known to interrupt the servers in site ██. After 85-100 hours the being will begin to return to a normal state, unaware of anything that previously happened. In creatures of higher intelligence they have said that the image of a camp fire in a dark, dense, forest is the only thing they can remember within the range of time of the test. After termination of the subject it would appear that a surprising amount of steel was in their bowels. Further investigation of the signal shows that SCP-███ can hear the signal and asked to know the source.
SCP-XXXX was found in a cave north of [DATA EXPUNGED]. The cave was 2 meters high and continued for 10 meters. The tablet was found 8 meters into the cave. The painting was created by, as the myth goes, the missing link. We have concluded, by investigations of the painting, that it was created by a human, or previous links to the human. It was carved out and immediately taken to the facility. Further investigations into the town have shown a history of anomalous events.
Incident Report 0001: Defective gas mask resulted in guard breathing in SCP-XXXX-1, they were terminated within 15 minutes of the incident.