Marceline tracks the Sky Witch, but finds out that she may need Princess Bubblegum's help.
- Barrier Warrior: Maja creates ton of barriers to protect herself.
- Bishonen Line: The Crabbit becomes more humanoid to fight Marceline's One-Winged Angel.
- Call Back: Manfried from all the way back in episode 1 makes a reappearance.
- Continuity Nod: Remember the witch that Ash sold the teddy bear to? Her name is revealed to be Maja.
- Eldritch Location: Maja's house is under a lake, which leads to an upside down house in the sky.
- I'll Kill You!: Marceline says this to the Crabbit, though it shuts the door her before she could do it.
- Knockout Gas: Bubblegum installs this in a Gumball Guardian which puts everyone, but Cinnamon Bun to sleep.
- Mix-and-Match Critters: Maja's crabbit, a mix of crow and rabbit.
- Our Witches Are Different: Maja is green and requires a Equivalent Exchange to endow others with powers. She has a natural Voice of the Legion.
- Red Oni, Blue Oni: Explored with Marceline (Red) and Bubblegum (Blue), with the former being forceful and hotheaded and the latter being passive and logical.
- Ship Tease: A lot between PB and Marcy.
- An interesting note is that in this episode, it is PB who is showing her feelings (to the audience at least) for Marceline. Whereas in "What Was Missing" it was the other way around.
- Sherlock Scan: Bubblegum is shown to have this ability.
- Spell My Name with an S: Lampshaded with Maja who can't pronounce the right name for the Crabbit.
- Voice of the Legion: Maja has this as a natural speaking voice.