An open grave is seen, and Jake is seen slowly crawling toward it. A giant bird scoops up the remaining worm, with the duo hitching a ride back to the Tree Fort. Turtle Princess then remembers that giant worms are destroying her Library, a task Finn takes care of easily using Jake's ice block and a wagon for a weapon. Finn manages to save both of them, Jake becoming partially frozen in the process. Ice King explains that if Finn saves one, the other will fall into boiling ice.

When they reach his castle, they find the two princesses tied to a unique contraption.

The two follow him, fighting a few snow golems on the way. It begins with Finn and Jake escaping a cave made out of ice cream, running from a group of ice cream monsters after they stole the prized '50-Flavor Ice Cream.' After leaving the cave, Ice King is spotted above, kidnapping Turtle Princess and Lumpy Space Princess. In this hallucination, Finn goes on an adventure that takes him back to his pre-teens, but things seem off. Many decades have passed since the events of ' Obsidian.' Through a hallucination, it is revealed that Jake has passed away, which severely traumatized Finn. After their death from natural cause many years after the events of Obsidian, Finn and Jake reunite to rediscover their brotherly bond and embark on the most important adventure of their lives.

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