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]
That eye in the glass ball reminds me of a "Third Eye" spell Twilight cast in a recent fanfic I read. I think it's...oh what was it again....
I remember now! It's "A World Without Rainbows", in it Twilight and a parallel universe Twilight (where the Sonic Rainboom by filly Dash didn't happen) switched minds, and it's up to the Twi's the rst of the mane six to go to the parallel Equestria and bring her back. The particular scene I'm reffering to is when Prime Twi (from original Equestria) while still trapped in the body of Parallel Twi, casts a "Third Eye" spell to be able to see the ropes behind her back while she unties them. Based on how the "Third Eye" is described, I imagined it looking something like this