When I slept in my childhood, there was a eldritch toy like demonic boogeymen named Looper in my dreams.

The spiders from Eight Legged Freaks

The Wormy Close Up and The Violin Girl from Courage The Cowardly Dog

THX , that's the only thing I could think of

The Frostbite Spiders from Skyrim.

If the devs wanted to make an unsettling enemy, they certainly succeeded.