rating: 0+x

SCP-XXXX, when placed in water

Item #: SCP-XXXX

Object Class: Euclid

Special Containment Procedures:

SCP-XXXX is to be kept in a 2x2x2 meter waterproof room. Each day, it will be fed 8.5 kg of bones, from any animal. Should the measured volume of SCP-XXXX exceed 6 litres, it must immediately be fed 8.5 kg of bone, and any overseeing researchers should be notified as soon as possible. Class-D personnel that perform this change must have a bone-related chronic illness.

No personnel other than Class-D are to be permitted near SPC-XXXX at any time, for any reason.

Description: SCP-XXXX is a sentient mass of liquid, composed of approximately one part bone marrow to one part human blood plasma. It was found in a remote swamp of ██████, █████ ███████ after a standard Foundation sweep of the area found a body with bones missing, yet no damage otherwise. An entire unit was lost from the initial discovery, which took place 05/15/████. Three men were lost on the recovery mission, which took place on 05/18.

SCP-XXXX appears to have no senses other than sight. Through unknown means, it also appears to have knowledge of the current health of subjects. Its method of locomotion and source of sight can not be determined. SCP-XXXX can adhere to most surfaces, including walls and ceilings. Currently, the only known materials it cannot adhere to are glass, ice and wax, though testing is not being done to further knowledge on this.

SCP-XXXX, upon gaining line of sight of a human's finger or toe nails, will immediately move underneath the nails and enter the blood stream. It then, over the course of approximately 5 minutes, will consume the bones of the subject. This will happen even when the subject's hands and feet are covered with protective equipment, including equipment that was thought to be waterproof. The fastest speed it has ever moved at is approximately 300 m/s. SCP-XXXX has never attacked any living creatures that do not have nails, but will eat their bones, if already deceased.

SCP-XXXX shows extreme dislike towards the disabled, and attempts from an amputee to touch it resulted in SCP-XXXX drowning the subject.1,2 SCP-XXXX has never shown any signs of starvation, nor has it ever excreted any substance.

SCP-XXXX will grow in size over time, and the blood plasma to bone marrow ratio increases drastically. Its volume doubles every 16 hours. Feeding it 8.5 kg of bone reduces its size by a factor of 2.5, and thus 8.5 kg of bone every 24 hours will keep it at a "constant" size. Over the course of 24 hours in this schedule, it will go from 2 litres to 5 litres, assuming it starts at 2. If unfed for a week, SCP-XXXX would grow to approximately 2048 litres, or 2 cubic meters.

Addendum XXXX-A:SCP-XXXX can break through seemingly anything by creating extreme pressure on either side of the object. It can only do this when it has access to both sides of a given object.

Addendum XXXX-B:SCP-XXXX appears to have some form of low intelligence, and becomes complacent (yet not docile) when given toys to play with.

Addendum XXXX-C:Below are all released test transcripts. Others have been withheld for either brevity or security.