Yeah, so that post is about exactly what Slim said when Twilight and her friends all gathered into my observatory for a meeting. Everypony was shocked at first, except Twilight. She told everypony that since before I'd contacted her, she's been researching what might be doing this. By now she's narrowed it down to about three different...horrible monsters. When she described each of them, the first two had some sort of plan attached, something we could do to stop it. The third didn't. Her description was...horrible. The worst part is that the third creature has a symbol that has always been associated with it, the one now shown as Slim's cutie mark. Now we're pretty sure that's what we're dealing with.
One of Twilight's friends (Her name has something to do with color and speed. I think.) immediately asked what had to be done to stop this thing. Twilight sighed, and explained that nopony had ever found a single witness or account of this creature being harmed, let alone defeated. She'd asked Princess Celestia (Yeah, apparently she can just write up the Princess with any problem whenever she wants. What.) and the princess said she knew of the creature, but had never found a way to deal with it. She just tries to control the damage it does, by limiting knowledge of it's existence. The only reason Twilight found out was because she has access to very restricted areas of the Royal Library.
I spoke up then, angry. Was there nothing we could do? Would we have to just sit here while it toys with Slim, me, and Twilight? Wait for our deaths? Twilight replied that she did have a worst-case scenario plan. If one of us were to...die, and we still hadn't found any way to stop it, we'd Execute Plan D. (Plans A-C were scrapped pretty early on, involving bigger monsters and Celestia.) I won't type out the plan here, because this blog is being watched. But I will say this: I hope to Celestia we don't have to use it.