Gamayun

This is a VNM that players are usually killing in pursuit of the empy shield/instrument. They usually don't want any drops from it, just a key item drop. They'll usually have a thief and will let you try to proc if you ask nicely.

The only downside to this NM is that she's (she's a garuda) only up once every 10-20 minutes, but people farming this will usually be there for hours.