Go to the Wu camp and find a gray-haired, female follower of Wu ( 802, 110, -302 ) /waypoint 802, 110, -302 - see picture to the right. Hail her and tell her "Friendship is an opportunity for manipulation".
Finish the dialog. She will change into Lynn Q'Tentu (60^^^ Heroic).
Note: If you select the wrong choice, she will despawn and respawn within 2 minutes.