Ok, so the raptor horns didn't work so well.  But that's all right -- no one got rich on their first try!  And besides, I think I found something that'll work even better in my smart drinks!$B$BThere is a substance called Wailing Essence, and I think it is the cause of the strange plants and animals in the Barrens.  Get me some and I'll try it in my drink!$B$BI heard the essence gathers in ectoplasmic creatures in the Wailing Caverns to the west.  Hunt those creatures and gather the essence.