Here is my submission for the MAMA contest. I have always been very afraid of sweet docile things becoming evil and twisted. Also, I have always found basements to be very eerie, they still creep me out.
Not normally into the gruesome, but your title just makes this perfect! I really love this! (might have something to do with my horse background? In fact, I think I actually owned this horse for 10 years, LOL!)
Lovely creature you have here! The first thing that pops into my head is a Hellboy quote, "skip to the end--how do I kill it?" lol
Living in California, I've never been in a basement, so I don't know the creep factor there, but I was terrified of closets for years as a kid. Of course, one opening up on it's own one day didn't help much. This is something I would have expected to emerge from a closet in the middle of the night, green glow and all, and the scariest part, I don't expect it's a slash-maim-kill type but something that would drag you back to it's nest and save you for snacking on later.