Darren's life seed releases a dust that revives the deceased candy people (without Root Beer Guy). Each candy person who was revived was shown to have sparkles surround them. When Finn is shown right after defeating Darren, he is shown with the same sparkles too, so it is implied that he had died and been revived.
Before his death, Darren's final words were, "Thank You." This could mean he wanted to die, which would mean he let Finn destroy him on purpose.
Finn has his steel sword back in this episode.
Maja is voiced by Jill Talley, wife of Tom Kenny who voices Ice King. Ice King's only line in this episode is "Hey! Leave me out of this!"
The Sun is revealed to be older than the Ancient Psychic Tandem War Elephant and to have its own consciousness.