I forgot all about these and have wasted a lot of killing without my teams shoulder enchants. They give a chance to drop items that have mats in them. check them out.. im using the one from high mountain atm.

http://www.wowhead.com/item=128554/e...enger#comments

Also, the one for a chance to drop Blood will be great for us..it will make grinding mobs fun! ( and if you have dual crafting )