SCP-017

SCP-017 (also known as Shadow Person) is a Keter-class creature in SCP Foundation.

Description
SCP-017 is a 80cm tall shadowy figure, roughly the size of a young child. SCP-017 seems composed of a shadowy, smoke-like shroud. No attempt to find any object beneath the shroud has been successful, but the possibility has not been ruled out.

Unlike some other dangerous SCP objects, it generally remains stationary and does nothing to actively harm anyone, until a shadow is cast upon it. SCP-017's reaction to shadows cast upon it is immediate and swift. SCP-017 leaps at the object casting the shadow and completely encloses it in its shroud, whereupon it returns to its normal size, leaving no trace of the object behind as if it was never there to begin with.

Any attempt of finding the whereabouts of SCP-017's victims has been unsuccessful, so it is unknown if it teleported them to somewhere else or simply consumed them.

Special Containment Procedure
SCP-017 is contained in an acrylic glass cage, centrally suspended in a concrete room. Attached to the walls, ceiling, and floor of the room are high-intensity arc lamp spotlights pointed directly at the acrylic cage, to ensure that SCP-017 is constantly exposed to light from every angle. Personnel assigned to the SCP-017 control room are to monitor the functionality of the spotlights and the emergency generator system and call for maintenance immediately upon knowledge of a burnt-out lamp or an issue with the generator.

The only circumstance under which personnel are allowed entrance is to replace lamps. Personnel entering the room are required to wear the designated full-body reflective suits, and must be cautioned not to step in front of functional spotlights.