The first step is to find a container capable of holding an extremely corruptible substance without the handler suffering ill effects.  There is only one sort device I am aware of that could possibly contain something as vile as the Felvine: a Reliquary of Purity.$B$BDeep in the wasteland of Silithus is the remnants of the night elf village known as Southwind.  I know one was there many, many years ago.  If we are to succeed, I need you to scour those ruins in the hopes of reclaiming it.