For that quest you have to kill Sunfury Warlock or Sunfury Summoners, who drop the item Scroll of Demonic Unbanishing (http://www.wowhead.com/item=30811/scroll-of-demonic-unbanishing), which you have to use to free the mob for the quest. Well you can get the scroll, but when you use it, nothing happens.
The quest A Necessary Distraction (http://www.wowhead.com/quest=10688/a-necessary-distraction) is bugged.
For that quest you have to kill Sunfury Warlock or Sunfury Summoners, who drop the item Scroll of Demonic Unbanishing (http://www.wowhead.com/item=30811/scroll-of-demonic-unbanishing), which you have to use to free the mob for the quest. Well you can get the scroll, but when you use it, nothing happens.