New Creepy Pony project! I'm going to be drawing the Mane Six as black and white Creepy Ponies and uploading one each day until I finish all six - then I'll post them all together in one big creepy picture!
For Twilight Sparkle it was hard to come up with something related to her Cutie Mark... Eventually I came up with this - she's blind and her horn is broken so she has to use "fake magic" - a superstitious crystal ball - to be able to see. The blindness is related to the fact that her Cutie Mark depicts some sort of light, which she now can't see.
An alternative, bloodier version where her eyes are still injured can be seen here: [link]
Personally, I prefer the one from photobucket more. Her eyes bleeding out to no longer see, yet, a part of her wishes to see something... worth beholding. a small glimpse of happiness maybe... or she just tore them out to punish herself? a self inflicted wound.