Why SCP-966 continually exposes these waves to only some of their victims is unknown.
It is currently thought that these are the effects of prolonged exposure to the waves. Other than the common symptoms caused by sleep deprivation, some victims of SCP-966 have shown signs of suffering from extremely vivid hallucinations, as well as sudden bouts of rage with no apparent external stimuli. Their hunting methods consist on emitting a single burst of a previously unknown type of wave, which permanently inhibits the ability of the affected creature to enter in any of the NREM and REM sleep stages. SCP-966 feed on medium-to-large sized animals, including humans. They are visible only at wavelengths ranging from 700 nm to about 900 nm.
They do not seem to rest through sleep instead, they will suddenly cease all movement at seemingly random intervals of time, resuming normal activity three to five minutes later. Physically, they are weak, possessing hollow bones and low muscular density. SCP-966 are predatory creatures that resemble hairless, digitigrade humans, possessing an elongated face with a mouth lined with needle-like teeth.
