It's Ninjutsu Earring and the drop rate is far worse than one vision per set of Promy ENMs. I've done somewhere between 12 and 15 runs and have had a total of 5 visions drop. The other group in my LS that does these runs has had similar results.
Good piece of gear. Luckily the AH has been flooded with these ENM Earrings lately on Caitsith and I was able to pick this one up at under 500K.