Demon Blood Sword

Jake's Family Sword is the sword that Joshua formerly owned. It was for the family, and is at the end of Joshua's Dungeon Finn and Jake to explored in the episode "Dad's Dungeon." It is made entirely out of Demon blood, as explained by Joshua in the hologram video that he made for Finn and Jake in the future to "toughen up" Finn. It was found in the last chamber of the dungeon, and was used to defeat the Giant Monster. It was tied up in chains and stuck in a rock when Finn found it, but the chains broke apart and was pulled out of the rock.