SCP-966, Slender Fortress Wiki

SCP-966 also known as The Sleep Killer is a boss on Slender Fortress. SCP-966 is a monster that can only be seen through night vision or infrared devices, it looks like a tall lanky humanoid with an alien like face with a boney head, long sharp claws, greyish skin that looks like it is tightly wrapped on the entity and outstretched limbs, they are extremely slow in containment breach and takes up to 30 hits to kill the player and can appear anywhere in the facility after you encounter their cont

SCP-966 Villains+BreezeWiki

Invisible Monsters - TV Tropes

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SCP-049, Slender Fortress Non-Official Wikia

Steam Workshop::SCP 966 - Playermodel

SCP-966 Villains+BreezeWiki

SCP-966 (Canon)/Gewsbumpz dude, Character Stats and Profiles Wiki

SCP-966, Slender Fortress Wiki

Throne of Salt: December 2018