You have recovered Spirit's Song!  It is the ata'mal crystal that Prophet Velen left behind with his people for safekeeping before he went upon his ill-fated mission to the Exodar.$B$BOdd that he did not foresee it falling into the hands of the Burning Legion, if even for a short time.$B$BOr, perhaps he did?  It may be that he foresaw all of this, and left it there so that you would retrieve the crystal and deliver it to me here?$B$BI sense that is the truth of it.  You are a great hero of your people, $N!