I've had this monster idea for a while, only recently deciding to try to make it into an SCP.
It has an oblong body, and 4 "tendrils" as legs. It floats, and the tendrils just lightly brush the floor. It's got a short neck and vaguely human shaped head, but with only minor depressions where all the facial features should be. It's generally an ambush predator, waiting just around corners or out of sight. It paralyzes prey by making "eye contact", then sticks the front 2 tendrils in their ears. They shake a bit during this process, and fall to the ground after the tendrils are removed. Autopsies reveal that the victims brain has been completely removed, leaving only the brain stem. It's unknown exactly how the creature takes the brain, as the tendrils don't appear to have any openings that could function as mouths.
Basically, I need a way of describing it (I would imagine that 'monster' looks bad in a scientific report), and something to make it creepier. Classification would be either safe or euclid, provided I could find a way to make it difficult to contain/unpredictable.
Sudden idea: After absorbing a brain, the creature's problem solving skills increase for a time proportional to the intelligence of the victim, and, in some cases, it can gain their short term memories as well. It has basic animal intelligence most of the time, so it steals brains to try to figure out how to escape.