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The multiverse, as revealed in "The Lich," is a set of multiple distinct universes, or "realities," of which the Land of Ooo, the rest of Earth and Mars are parts of. Although many universes are implied or alluded to in the episode and its follow-ups, which are "Finn the Human" and "Jake the Dog," a universe known as the Time Room, which is said to be the source of all time, receives particular focus. The concept of the multiverse is based on the popular real-world idea that various parallel universes may exist with different physical laws, histories and/or dimensionalities.
Map of the Multiverse

When the sword on the Enchiridion is turned sideways, it displays a holographic map of the known universes of the multiverse, as well as the connections between them. In it, each universe is represented by a unique three-dimensional shape. Whether these shapes are true reflections of the universes or just symbols to help distinguish between them is unclear, although the depiction of the Time Room on the map is very similar to the depiction of the actual Time Room in "Finn the Human" and "Jake the Dog."
Known Universes
"This" Universe
Land of Ooo
Described by Booko as "the dimension in which we currently reside," this reality is presumably where most of the series takes place, including locations such as the Crystal Dimension, the Dead Worlds, Lumpy Space, and the Nightosphere. On the multiverse map, it is visualized as a sphere inscribed within a spinning cube.
Time Room
The Time Room
Explained by Booko, the time room is said to be at the center of the multiverse, and is a special dimension which exists outside of time. In "The Lich", Booko refers to it as 'the dwelling place' of a being, known only as "the almighty Prismo". Though he does technically own the time room, as he does call it "his time room", he is not the one flowing the existence of time across the multiverse, that role is fulfilled by none other then "The Time Core" which are beings that resemble that of a sundial clock, and an hour glass, shown in Fionna & Cake season 1, episode 4, 16:05. The two beings of time both slam and smash a silver and bronze sledge hammer against each other which is what admits the experience known as the passage of time. And as powerful as Prismo is, even he is limited in knowledge of these two beings, saying himself that he is unaware if they are alive or not.
Because it is described as a "quasi-corporeal," "single dimension," it is possible that the Time Room has no real physical existence and that its appearance in "Finn the Human" and "Jake the Dog" is merely either Finn and Jake's conception of it or Prismo's presentation of it. On the multiverse map, it is visualized as a cube with smaller cube-shaped voids in the centers of its faces.
Fionna's World
Fionna-World
As stated by Prismo himself, this universe he created was formerly located outside of the multiverse, not being officially connected with others, like "free radicals", instead happening inside Simon Petrikov's mind, implemented when he was still the Ice King. This turned this world into one of the only ones to be logically immune to be invaded by a copy of the Farmworld Lich's hand by its standard replication method. The Fionna-world was originally created as a pastiche of the Land of Ooo but with the genderbent versions of their characters. After the events of "Come Along with Me" with Simon being healed, Fionna-world lost their magic alongside him, turning it into a universe very similar to our own (the real world). In "Cheers", this universe was added to the full Multiverse. In "The Bear and the Rose" Fionna's world has now been combined with multiple realties into a single one, making her world no longer a seperate universe presumably after it became authorized.
Farmworld
Farmworld is an alternate timeline created when Finn wished that "the Lich never even ever existed" in the episode "Finn the Human". For this to have happened, the mushroom bomb would have had to not go off. In the alternate timeline created by this wish, Simon Petrikov froze the bomb before it was detonated. As a result, Humans continued to thrive, the Lich was never released, and there was no nuclear fallout to bring back magic.
Pillow World
Pillow World
The Pillow World is a realm Finn visits in his pillow fort in "Puhoy". He visits this realm after he decides that he needs some alone time to think about his situation with Flame Princess. GOLB seemingly destroys this world at the end of "Puhoy".
Golb's Empty Universe
GOLB's Dimension
Somewhere in the void of nothingness lies the dimension GOLB remains in. As seen in "Puhoy", "Casper & Nova" and "Cheers", GOLB remains still in this void until something piques his interest (for example, Finn bouncing off his tongue and the Lich calling her attention). In "Cheers", when GOLBetty blows Simon away, there are nearby rocks that connect to the multiverse.
Water Park World
Water Park Prank World
The Water Park World is a world that the episode “Water Park Prank” takes place in. In this world, Finn and Jake go to a water park and prank Ice King. This world isn’t revealed to be an alternate universe until “Cheers” when Simon briefly steps foot on it while trying to get home to his universe.
The Grotto's Treehouse
Grotto World
The Grotto world is an alternate universe accessible through the Grotto nearby Finn and Jake's Treehouse. It's later revealed that this world was created from one of Prismo's wishes, though Prismo cannot recall who made the wish.
The Silent World
Silent World
The Silent world was created after Wyatt mistakenly wished for things to be more quiet, resulting in Prismo granting the wish. It is based on films of the silent era.
The Marvelous Misadventures of Flapjack World
Flapjack's World
World where "The Marvelous Misadventures of Flapjack" takes place in. It is an actual cartoon that ran for 3 seasons on Cartoon Network from 2008-2010. The Flapjack world was a world existing without the need for a wish to create it, and is the only other known Cartoon Network show to be a universe in Adventure Time's multiverse.
The Funny Shape World
Funny Shape World
The Funny Shape World is an alternate universe created by an unknown individual through one Prismo's wishes. It was seen briefly during the episode Prismo the Wishmaster.
The Winter Kingdom
Winterworld
Winterworld is an alternate universe in which Ice King was able to transfer his insanity to Princess Bubblegum, resulting in their roles being swapped. This world is seen again in The Bear and the Rose, where an alternate Finn is now dating an alternate Slime Princess.
The Baby World
Baby World
Baby World is an alternate universe where every being is a baby with Gumball Guardians serving as protective babysitters.
The Vampire King's Castle
Vampire World
Vampire World is an alternate universe where Simon Petrikov (who never became Ice King) died in the Mushroom War and Marceline was adopted by Vampire King, who used the crown to permanently block the sun and take over Ooo.
The Lich's World
Extinct World
Extinct World is an alternate timeline that The Lich created through Prismo's wish. It is a completely barren and dead wasteland, with only artificial beings like BMO left, including The Lich himself.
Orbo's Domain
Orbo's Domain
This world is first shown in "Jerry". It is where Orbo resides.
Jakeworld
Jakeworld
This world is shown in "Cheers" when Simon briefly steps foot on it while trying to get home to his universe. It appears to be made of Jake.
Bearworld
Bearworld
This world is shown in "Cheers" when Simon briefly steps foot on it while trying to get home to his universe. It appears to be inhabited primarily by tiny bears. A bear version of Finn and Ice King can be seen, as well as a bear version of an unknown character.
Magwood World
Magwood World
This world is shown in "Cheers" when Simon briefly steps foot on it while trying to get home to his universe. This world appears to be one where Magwood was not slain by the Comet.
Industrial World
Industrial World
This world is shown in "Cheers" when Simon briefly steps foot on it while trying to get home to his universe. It was only seen very briefly, but it seems to contain many green, pollution-spewing factories.
Water World
Water World
This world is shown in "The Crocodile Who Bit A Log" and "The Bear and the Rose" as Huntress Wizard is trying to get back to her universe. A large being exists here.
Cosmic World
Cosmic World
This world is shown in "The Crocodile Who Bit A Log" and "The Bear and the Rose" as Huntress Wizard is trying to get back to her universe. It appears to lack a breathable atmosphere, and has many planets visible in the sky.
Possible Universes
Crystal Citadel
Minecraft World
Adventure Time Mash-Up Pack World
Artifacts linking Universes
When Booko describes the connections between the universes, he mentions that connections can be formed artificially by "artifacts of great power."
The Enchiridion
When the jewels from the crowns of all the princesses of Ooo (and the Ice King) are placed in the Enchiridion, it gains the ability to open a portal to any universe in the multiverse. However, it seems that this power can only be used once: in "The Lich," Finn inadvertently creates such a portal when he tries to destroy the Enchiridion and prevent the Lich from obtaining it. After the portal closes, the jewels reappear but the Enchiridion seems to have been permanently destroyed.
It is unclear why the portal Finn opened led to the Time Room, the exact place the Lich was trying to get to. It is possible that the portal merely led to the space in between all of the dimensions and the Lich could have chosen, hypothetically, to go to any dimension he wanted to.
Prismo's Pickle Jar
Which let the user go directly to Prismo's time room by either spelling Prismo's name or touching the "P" mark on the letter. Jake gain this object as a gift from Prismo due their friendship at the end of "Jake the Dog". However, it is later revaled in "Is That You?" that the jar was part of Prismo's plan in case he died and needed the help of Finn and Jake to be resurrected.
Prismo's Remote
A remote control that allows the user to monitor or travel between the different universes like channels on a television.
