i was lvling my skill today and by chance i got this i was suprise cos my skill was only 3 this is how i got it it was darksday at 19:00 98% fullmoon and i was facing NW at the time that all i can say it might have been a fluke though but hope it helps
I was really bored, and since you look like your a pimp when you wear one (lol) I bought one on Migardsormr for 2000 gil, the 3 before mine sold for 1000.