“The Last Oasis” is a jazzy psychedelic track that follows someone trying to find water in a hot, desert world. The narrator sees a mirage and dubs it the last oasis — a rare sight that provides a sense of safety, though it's only a dream. While it largely focuses on the desert, the song also makes a few references to outer space by comparing the mirage to a lost astronaut, and name dropping the astrophysicist Thomas Zurbuchen. The track utilizes marimba and Mellotron as well as distinct production to give it a laid back vibe, though the song ends on an ominous note, both musically and lyrically.