Here you go
http://youtu.be/LIp86f6dEw0 the latest kill video recorded by me but I guess its just a coincedence that I post a lot of paladin forums, is named Pacer and that the person in that video is a holy paladin named Pacer. I know it drops 6 pieces of loot and you can see that at the end of the video.
Anyways the 6th piece of loot is an incentive yes, its an incentive because you need to have huge rosters in 25 man guilds. A roster of 30 people is not enough for a successful 25 man guild however a roster of 12 people for a 10 man guild is more than enough.