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 wierd 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. Next, the walls start to come in on everyone. Everyone panics as they look for a way out. A door opens, and Tree Trunks runs through it, but ends up falling. Neptr eventually ends up saving her. Lemongrab gets angry, and he scrapes his finger across the floor. A door opens up, and everyone falls.

Everyone thinks they'll never get out of the dungeon, because there isn't a door. Lemongrab asks how 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." Neptr finds an oven and says he can cook. Tree Trunks says she can cook an apple pie. Minutes later the pie is done. Everyone smells it as well as a rat. The rat comes out of a door, and it eats the pie. Lemongrab hits it, and he starts eating out of its mouth. Everyone else is in disgust. They remind Lemongrab that the rat lead them to the next part of the dungeon.

Major characters

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

Minor characters

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

Trivia

 * It is revealed in this episode that the Ice King loses his powers in very hot conditions.

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.
 * The same background music from "Hug Wolf " was played.

Storyline analysis

 * Considering the ease of inanimate objects coming to life in the world of Ooo, as seen in such episodes as What is Life? and Another Way, the punchline of the Ice King's request to bring his fan fiction book to life should have been more obvious; particularly due to Neptr, the son he himself helped create with his own magic, being one of the objects brought alive in a previous episode.

Videos
Adventure Time - Mystery Dungeon (long preview)|Long preview Adventure Time - Mystery Dungeon (short preview)|Short Preview