고산유수

This is a timegated 2 day achievement. The first time you interact with the Ghost Actor in Fyxestroll Garden, she will teach you a song. Come back the next day after server reset to speak with her again where she will ask to sing a duet with you. The Ghost Actor will then sing the first half of each line, and you'll need to fill in the rest. If you perfect it, you'll receive the achievement 'Mountain of Recto, Water of Verso', however, if you make a mistake you'll get 'Apprentice, Disciple and Renegade'.

A reference to "High Mountain and Flowing Water," one of the top 10 Chinese classical melodies. It's associated with the story of Yu Boya and Zhong Ziqi, representing the understanding and appreciation between close friends/soulmates (although Trailblazer's soulmate is definitely not the Ghost Actor, it's the TRASHCAN!) - Credit: Necrosyrtes