Plants give life to Felwood, yet even they suffer the taint of corruption.  I know ways to cleanse them, but I cannot give out such knowledge to those I don't know or trust.  Prove to me that you will truly aid the cause of the Cenarion Circle!$B$BTo the north lie the Irontree Caverns.  The Warpwood elementals present there are now beyond hope of cleansing.  I ask you to bring me their sap - blood amber it is called - so I may study it in the hopes of saving other forms of life here.