Mystery Dungeon

Synopsis
Ice King, Neptr, Tree Trunks, Shelby and Lemongrab must work together to escape a dungeon they mysteriously awaken in.

Plot
The episode starts out with Ice King, Neptr, Tree Trunks, Shelby, and Lemongrab awakening in a dungeon. Lemongrab starts to say cryptic words, leaving the others in confusion. Tree Trunks asks Lemongrab what he just said, and he says he was reading the words on the wall. Then, all the characters start reading the wall, which says:


 * "Awake, avast, hold tight your buns, if buns you do hold dear

For time has come to wake and run and not give way to fear

Beyond this room are a thousand rooms, outside of them still more

Behind each door, on every floor, danger, danger, ever more.

Stranger, hark! The traps galore may kill you whilst you do explore

To free yourself from this tomb, and nevermore re-enter

Find the room amidst the rooms that lies exactly center."

The walls then starts to come in on everyone. In panic, Tree Trunks opens a door, not knowing that it leads to a deadly drop deep into the dungeon. Neptr saves her with one of his "mods" (an extendable arm). Through all the confusion and panic, Lemongrab notices the lock for the trapdoor on which they were standing and proceeds to unlock it.

Falling to the next room, the Ice King quickly notices its lack of doors. Lemongrab, in frustration, asks how the Ice King tastes. Ice King says he does not know. Lemongrab gets angry and screams, "MILD OR SPICY?!" Ice King remembers himself kissing his hand, and he says," A little lonely." Lemongrab then demands that the Ice King "make [himself] into food." Neptr quickly breaks up the fight, pointing out that he found an oven and baking supplies. Tree Trunks says she can bake an apple pie for them. Minutes later the pie is done, to the delight of the hungry group. The pie's aroma lures a giant rat (out of a secret door) which quickly eats the pie. In anger, Lemongrab punches the giant rat; and starts eating the pie out of its mouth (to the disgust of the others). The Ice King then points out that the rat showed them the room door.

They crawl towards the next room, which has a pool of steaming water with a giant fish tied to a plug on the floor. Ice King tries to fly them over, but the steam is nullifying his powers. He then tries to freeze the water, but the steam quickly cancels the magic before it even leaves his hand. Giving up, he tells the others they can have his corpse for food, to which Lemongrab wholly assents. Shelby thinks of an idea, which involves using Tree Trunks as bait. The Ice King then struggles to reel the fish out of the water with Neptr's help, unplugging the hole in the process. Tree Trunks frees herself out of its stomach with the dagger that she was biting down on, and they proceed to the next room.

Upon entering, they quickly encounter a giant three eyed tentacled monster. The group would have been overwhelmed had it not been for Lemongrab's juice being squeezed out by the monster (which seems to be its weakness). The encounter leaves Lemongrab literally drained. Tree Trunks then inflates him back to normal, oddly restoring his "vital juices" in the process. The group then enthusiastically runs to the next  room, unaware of the fact that the bridge is broken. Using his torn robe as a makeshift parachute, the Ice King flies them back up to safety and in front of the door to the central room.

Neptr then explains that the door is secured by an esoteric encryption system. The Ice King confidently replies that he can easily "hack the mainframe" (mistaking Neptr for BMO). Neptr confusedly states that he throws pies. Ice King then angrily states that he grabbed the wrong robot, which makes Tree Trunks and Shelby realize that something is wrong. The Ice King confesses, explaining that he brought them to the dungeon due to their unique qualities—qualities which enabled them to get past the various tests of the dungeon. The Ice King is ready to give up, frustrated that he accidentally bought Neptr along instead of BMO. Still eager to please his "father," Neptr throws a pie at the door, breaking and opening it in the process.

It is then revealed that the door contains the Ancient Sleeping Magi of Life Giving. The Ice King explains that anything that goes through its flames comes to life. Showing his "Fionna and Cake" fanfiction, the Ice King reveals that he intends to bring the characters of his fan fiction to life. A dismayed Lemongrab attacks the Ice King with his sound sword, which strikes the Ice King, but not before he throws his fan fiction towards the flames. However, the flames can only bring the book to life, not what is written on it. A disappointed Ice King is quick to blame the Magi, telling him to "get out of his face."

Finn and Jake are then seen on the grasslands, following the smell of the pie that Tree Trunks made earlier. The Magi then flies off behind an unaware Finn and Jake, followed by the rest. A depressed Ice King sits down nearby, approached by Neptr. Neptr comforts him, saying that his characters can always be real in "the garden of his mind." Delighted, the Ice King imagines talking to Fionna, unaware that it is actually Neptr talking. Finn, Jake, and Shelby watch from a distance wondering who in the world is sadder than the Ice King, to which Shelby replies, "Me, watching this."

Major characters

 * Ice King
 * Tree Trunks
 * Earl of Lemongrab
 * Shelby
 * Neptr
 * Ancient Sleeping Magi of Life Giving

Minor characters

 * Finn
 * Jake
 * Fionna (Imagination Zone)
 * Cake (Mentioned)
 * Marshall Lee (Mentioned)
 * Gunter (Flashback)
 * BMO (Mentioned)
 * Monster Fish
 * Snail

Trivia

 * It is revealed in this episode that the Ice King loses his powers in very hot and humid conditions.
 * It is revealed that the Ice King almost completely does not remember Neptr, which is a stark comparison to the events in "What is Life?" where the Ice King thought of Neptr as his own son.
 * Finn and Jake can be seen in the hieroglyphics of the title card.
 * It is revealed that when Lemongrab is squeezed, lemon juice comes out of him, which is like Lemongrab's "blood."
 * He is also shown to be able to stretch and extend his jaw, revealing a multitude of razor-sharp teeth.
 * This is the first time the gender-swapped version of Marceline, Marshall Lee, is mentioned by name in the series.
 * Tree Trunks calls the others incorrectly: She calls Ice King "Ice Cream" and Lemongrab "Lemoncarb." She also refers to Neptr as "Nectar." Shelby's name is the only one that she appears to say correctly.
 * It is revealed that Lemongrab has a great memory.
 * Although Fionna appears and speaks in Ice King's Imagination Zone, it is Neptr's (Andy Milonakis) voice and not Fionna's (Madeleine Martin) that is heard.
 * Tree Trunks knew that there were two Lemongrabs because she said to Shelby, "...and one of the Lemongrabs."
 * When the book comes to life, its shoes are similar to that of Finn's.

Cultural references

 * Of the images that appear on the computer mainframe, some recognizable images include: The, a man with a sword in his abdomen, a hand grabbing a key, and an hourglass.
 * When Ice King's book come to life, the design of its arms, legs and voice (laugh), are much similar to Disney's Mickey Mouse.
 * The scene when Lemongrab shows his teeth is similar to Jennifer showing her teeth when possessed in "Jennifer's Body."
 * When consoling the Ice King, Neptr refers to "the garden of your mind," the idea first publicized by Mister Rogers of Mister Rogers' Neighborhood, who said, "you can grow ideas in the garden of your mind."
 * The episode was somewhat inspired by the Cube film series.
 * The name of the episode may be a reference to the Pokemon Mystery Dungeon series of games.
 * On the Ice King's book reads the word "omnibus," which is an old word for a bus, or a book containing reprints of a number of works.

Episode connections

 * Lemongrab is shown to still posses the ability to rotate his head nearly a full 360 degrees, as he did in "You Made Me" when addressing the Pup Gang.
 * This is also the second time he uses his sound sword.
 * His question to Ice King, "MILD OR SPICY?!" could refer to the episode "Too Young" when Finn and Princess Bubblegum spiced up nearly everything he ate to get him to leave the Candy Kingdom.
 * This episode connects to "What is Life?" through the reunion of Ice King and his "son" Neptr; it further is connected by Neptr reminding his dad of the Imagination Zone when he is desperate to see Fionna come to life.
 * The fan-fiction Ice King showed Finn and Jake in "Fionna and Cake" was shown again for the second time in the series.
 * The title card music of "Hug Wolf" can be heard when Neptr was saving tree trunks from falling.
 * This was the second time Ice King's beard was shaved, the first was in "Loyalty to the King," although this time it was blown off by the intense impact of Lemongrab's sound sword.
 * Lemongrab still does not seem to know where food comes from, as he first mentioned in "Too Young."
 * When the Ice King's beard is cut off, he resembles the Nice King from "Loyalty to the King."

Errors

 * Lemongrab was able to read the wall without his glasses.
 * There was no a puddle of blood near the pile of skulls when the giant spiked gate opened itself. It appeared when Lemongrab was lying down on the floor and a puddle of blood that was around a spike is gone. Also when Tree Trunks is helping Lemongrab recover some juice, there are some skulls stacked up against a spike that were not there before and all the blood on the spike is gone.

Production notes

 * This episode aired early in Australia, and some parts were censored.