After coming face to face with GOLBetty, Simon finds his mind displaced into another body across time. Meanwhile, Fionna and Cake return to their old world and confide in Gary and Marshall Lee about their journey.
Tropes Include:
- Asteroids Monster: GOLBetty's attempts to destroy Scarab, who is immortal, only split him into dog-sized beetle creatures. It's implied this could eventually be fatal since he's scared into escaping.
- Berserk Button: For GOLBetty, it's messing with Simon. Once Scarab starts messing with Simon, she starts attacking him, and it's implied that he only lasted long enough to flee through the portal to Fionna's world because his immortality kept her from immediately killing him. This also applies to Simon himself, as her eyes irises shake in anger when he tries to become the Ice King again by putting the magic crown in his head, forcing her to transfer her beloved's mind into Shermy's body in the future at the last moment to stop him and teach him a lesson.
- Bloodless Carnage: LSP in Fionna's nightmare is ripped open by squirrels, but instead of guts he's spilling out spaghetti.
- The Bus Came Back:
- After only appearing as characters in a Flash Forward in the original show's Grand Finale, Shermy and Beth (as well as the future Ooo they come from) return.
- Similarly, the Pagelings from "Paper Pete" return in the Library and have turned feral due to most of the books being gone 1000 years in the future. Although, it never explains how they got so big...
- Cassandra Truth: It takes a while for Simon to convince Beth that he isn't Shermy, but an antiquarian from an alternate universe looking for a magical crown (that she never heard of).
- Cliffhanger: The episode ends on the Scarab, fully reformed, blowing up Fionna's apartment and giving the Fionnaworld group a Death Glare.
- Did Not Think This Through: When Gary, Marshall Lee, and Hunter decide to accompany Fionna and Cake through a portal to find Simon, none of them consider the fact that one of them should stay and look after the Scarab to prevent the chances of them escaping imprisonment and reforming
- Do Not Taunt Cthulhu: Scarab is haughty enough to demand GOLBetty not interfere with his mission, but when he messes with Simon she attempts to destroy him, scaring him into escaping into his head.
- Dramatic Irony: Simon is transported into the mind of Shermy. He believes he is in an alternate universe, unaware that it is the far future of his homeworld.
- Dream Intro: Upon reentering their world, Fionna and Cake both have a dream that their world was reverted to its former, magical state. Upon returning to the city they lived in however, they found that their friends were suffering from the transformations that they underwent being corrupted, with Gary becoming a formless slime-like gum monster, Marshall as a hideous vampiric demon that burns in the sunlight, and Ellis P.'s insides being made of spaghetti. When they return to their apartment, Fionna opens the freezer to get some food, only to find a half-dead Simon inside asking if he gave them what they wanted. Everything is shown to still be normal when they wake up.
- Forced Transformation: The Lich's demands to GOLBetty get his body turned into one of the shapes surrounding her, his skull seemingly sealed inside.
- Foreshadowing: Fionna wearing her blue shirt again at the beginning clues in that she's dreaming.
- Mental Time Travel: Simon ends up in the body of Shermy, 1000+ years into the future of the Ooo he knows.
- The Mirror Shows Your True Self: When Simon is placed into Shermy's body, his real self is seen in Shermy's reflection.
- Nice Job Breaking It, Hero: After the gang manages to imprison the miniature Scarabs in separate jars to keep them from reforming, a well-intentioned but unwitting Ellis sets all the Scarabs free, which allows them to reform.
- Rule of Symbolism: While talking with GOLBetty, the portal to Fionna's universe creates a glowing effect around Simon's head that looks like a saint's halo.
- Shut Up, Hannibal!: The Lich's demands to GOLBetty end up getting him turned into one of the tetris-like platforms surrounding the chaos deity.
- Spit Take: Gary and Marshall do this in response Fionna's "overalls" revealing herself to be a shapeshifting Cake in order to ask Simon what the hold up with the magic is about.
- Sympathy for the Devil: Simon briefly tries to empathize with the Lich due to being able to relate to losing purpose in his life, but the Lich completely ignores him.
- Too Dumb to Live: The first time Scarab attacks Simon in front of GOLBetty could be justified by him simply not knowing the connection. After she shakes with rage and smites him, though, continuing to attack Simon in front of GOLBetty seems a poor strategy.
- Unusually Uninteresting Sight: Most of the people at the ice skating rink don't seem to react to Cake talking and shapeshifting.
- Unusual User Interface: In Shermy and Beth's time, books have gotten weird. They've evolved to have a gun handle on the bottom of the spine, not opening until the trigger is pulled, from which point the book opens and projects its contents as a hologram as it flips through the pages.
- Villainous Breakdown: When Simon and The Lich find themselves in GOLBetty's void, The Lich completely loses it in their face, raging about how meaningless his life had become after he accomplished his mission and now feels abandoned by his god. GOLBetty answers by painfully turning him into a lifeless platform, and then adds him to their collection in the void.
