Grimish in the RD Orc Camp asks for 3 Vampire Bat Wings (you can find them from Vampire Bats in the Broken One Cave). Say “Count Hemogoblin” to him and then “Yes” and he will reward you with 6.000 Experience Points and a Ring of Accuracy for giving him the wings.
Note #1: Grimish asks for 3 Vampire bat wings (and you must have 3 in your inventory), but he actually gets 2 from your inventory.
Note #2: You can do this quest as many times as you want
NPCs involved: Grimish
Quest Reward Synopsis: 6.000 Experience Points, Ring of Accuracy