What is the name of this Hunter x Hunter (2011) song in episode 20? In Hunter x Hunter (2011) episode 20, there's music playing on around 03:21.

What is the name of the song?
The song playing during 3:23-5:27 is known as Unreleased Departure Instrumental Variation #1

It is not part of the official released ost, and is a play on the song Departure for strings.
Which was included as the 25th track in OST 2

Source