General

Tristans Pupil quest

I'm doing the quest called "Tristan's Pupil" for Dual Blade.
I was told to talk to Mu Young and get Tristan's Keepsake, but when I talk to her she has a uncompleted quest icon above her head.
All she says is, "Can you hear my master's voice? He shows up here all the time, even if he's a ghost. Your lightbulb icon seems to be picking up a strange voice."
There is also a portal to the left, but when I try to go through it, it says in chat, "Tristan's Spirit: You do not have what it takes to leave this area yet."

Help? I've tried everything to complete this quest