Oceania
Oceania, previously known as The Endless Longing of Sea Doves is a nearly solved Lostwave. It was firstly appeared on the web because of 1993 Dead Can Dance bootleg album "The Golden Age" and mostly considered as a misattributed to Dead Can Dance. However, it's almost fully proven that it really originates from Dead Can Dance concerts of December 1988 in Hamburg and Paris as an opening act, being the only appearances of the track. According to tracklist it's called "Oceania" and the duration is about 20 minutes. Among with some other DCD tracks, such as Awakening, Ocean, and others, it is never released and appeared on various bootleg albums.
Oceania was considered as the longest Lostwave song.