If you'd read the replies you might've known :roll: As far as I know, some monsters have a set of items which count as "rare" drops. The RoW increases chances of "valuable" rare drops, where valuable means "worth a lot of gp when sold to a shop". There are ofcourse exceptions: it will not affect drop rates of gems and halves. Also, it's effect is rather small, and the randomness of the drop system is, well, random, so only extremely large scale tests would provide accurate info.