OK, first off this spell makes me laugh everytime I cast it.
Alright to business, I got this in Ranguemont Pass. I don't remember the <pos>, but I do know that if you stick to the right and take every right that doesn't lead to a dead-end you will run into the Hecteyes within 5 mins of running(assuming you don't have a map like me).
They all conned @ DC to me @ 35, and I was subbing NIN for the shadows. Their Black Magic is pretty strong and they cast alot of ~ga spells, which will strip your shadows. Also they have a very nasty WS move called Hex Eye, that has a very very nasty Paralyze effect. The Paralyze effect from their move kept me paralyzed 95% of it's length. I came close to death a couple of times, but luckily I didn't die.
I got mine the 3rd time it used it on me, this was with capped BLU Magic as well (108 @ 35).
Good Luck to others and make sure and not forget your Warp Scroll if you go to get this in RP like me.