This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Travel to Ironforge and get High Priest Rohan's Exorcism Censer. You will need to make a donation of 150 gold in order to secure it.
Required money: 150
In order to prepare yourself for this task, you must first show due sacrifice and judgment... with an emphasis on sacrifice.
You must acquire High Priest Rohan's exorcism censer for your task. Even though its use will be for good and just reasons, due compensation must be given for it.
Proceed to Ironforge and speak with the High Priest. By bringing ample coin with you to help offset the loss of his censer, it will show your due sacrifice.