Zyn or another mod should be over here soon to advise you not to post full drafts in the forum.
They'll also probably mention that you should post a link to a sandbox page instead.
Firstly, the tone feels wrong. In many of your descriptions of the scip, it sounds way too subjective. I'm talking about things like:
to be very, and worryingly, intelligent
frowning, ghastly orange eyes
not to exhibit this behavior, upon being left alone that is
Devices like 'that is', adjectives like 'ghastly, and preceding a sentence with 'So' belong in things like tales.
Also, it feels like Slenderman. All I got from this article is that it's a Keter thing that strangles/bashes people to death when it gets dark. You may have a difficult time turning this into something more interesting, even with expansions. My advice is that you change the base idea a little— maybe add a backstory of discovery or something.