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 a fade-in effect, Ice King, Neptr, Tree Trunks, Shelby, and Lemongrab awakening in a dungeon. Lemongrab starts to say weird 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.


 * "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 opened a door, not knowing that it leads to a deadly drop deep into the dungeon. Neptr saved her with one of his "mods" (an extendable arm). Through all the confusion and panic, Lemongrab noticed the lock for the trapdoor on which they were standing; and proceeded to unlock it.

Falling to the next room, the Ice King quickly noticed its lack of doors. Lemongrab, in frustration; asks how the Ice King tastes. Ice King says he doesn't know. Lemongrab gets angry and screams, "MILD OR SPICY?!" Ice King remembers him kissing his hand, and he says "lonely." Lemongrab then demanded that the Ice King "Makes himself into food." Neptr quickly broke 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 lured a giant rat out of a secret door, and quickly ate the pie. In anger, Lemongrab punched the giant rat; and starts eating the pie out of its mouth (To the disgust of the others). The Ice King then pointed out that the rat showed them the room door.

They crawled 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 evaporates the ice before it even leaves his hand. Giving up, he tells the others they can have his corpse for food; to which Lemongrab wholefully agreed. Shelby thought of an idea, which involves using Tree Trunks as bait. The Ice King then struggled to reel the fish out of the water with Neptr's help, unplugging the hole in the process. Tree Trunks freed herself out of its stomach with the dagger that she was biting down on, and they proceeded to the next room.

Upon entering, they quickly encountered a giant three eyed tentacled monster. The group was almost overwhelmed, had it not picked up Lemongrab and squeezed him (Lemon juice seemed to be its weakness). The encounter left Lemongrab literally drained. Tree Trunks then inflated him back to normal, oddly restoring his "vital juices" in the process. The group then enthusiastically ran to the next  room, unaware of the fact that the bridge is broken. Using his torn robe as a makeshift parachute, the Ice King flew them back up to safety and in front of the door to the central room.

Neptr then explained that the door is secured by an esoteric encryption system. The Ice King confidently replied, stating that he can easily "hack the mainframe" (mistaking Neptr for Beemo). Neptr confusingly replied, stating that he throws pies. Ice king then angrily stated that he grabbed the wrong robot, which made Tree Trunks and Shelby realize that's something's wrong. The Ice King confessed, explaining that he brought them to the dungeon due to their unique qualities. Qualities which enabled them to get past the various test of the dungeon. The Ice King was about to give up, frustrated that he accidentally bought Neptr along instead of Beemo. Still eager to please his "father," Neptr  threw 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 explained 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 struck the Ice King; but not before throwing his fan fiction towards the flames. Unfortunately, the flames can only bring the book to life; not what was written on it. A disappointed Ice King was 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 sat down nearby, approached by Neptr. Neptr comforted him, saying that his characters can always be real in "the garden of his mind." Delighted, the Ice King imagined talking to Fionna (which 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 replied, "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)
 * Princess Bubblegum (Mentioned)
 * Monster Fish
 * Snail

Trivia

 * It is revealed in this episode that the Ice King loses his powers in very hot conditions.
 * It is revealed that the Ice King almost completely doesn't 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 called Neptr "Nectar." Shelby was the only one she called correctly by name.
 * Additionally, Lemongrab didn't react as dramatically when his name was said wrong as he did in "You Made Me."
 * It is revealed that Lemongrab has 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.
 * 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.
 * The fan fiction Ice King brought with him must be a new one because he was still writing on it, maybe he still didn't finish it yet until the got to the center.
 * Tree Trunks knew that there were two Lemongrabs because she said to Shelby "...and one of the Lemoncarbs (Lemongrabs)'.

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.

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.
 * 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.