The root sword was Finn's second sword in the series, he mostly used it during seasons 2 and 3, and later briefly in season 8. In "Mystery Train," Finn obtained the root sword, which became his primary weapon. He finds the sword on the caboose of the train and uses it to attack the conductor. He...

Root Sword: In "Mystery Train," Finn obtained the Root Sword (the name is non-canonical), which became his primary weapon. He finds the sword on the caboose of the train and uses it to attack The conductor. He next uses it against the Monster in the beginning of "Belly of the Beast".

Aug 8, 2022 · It's unofficially called the "Root Sword". He got it way back in season 2, episode 19, "Mystery Train", and used it up until he got the Blood Sword. It's the only sword he never lost, so he started using it again after Finn Sword was broken.

The Root Sword was Finn's second main weapon which replaced the Golden Sword. This sword made its first appearance in the episode "Mystery Train," where Finn obtained it inside the train. He used it to fight the Conductor (which was really Jake), which the fight led to …

The root sword was Finn's second sword in the series, he mostly used it during seasons 2 and 3, and later briefly in season 8. In "Mystery Train," Finn obtained the root sword, which became his primary weapon.

No, he received that sword in 'Mystery Train', and fans have dubbed it the 'Root Sword'. There is in fact a lot of consistency in the swords Finn wields, far more than you might expect form a normal 'kid's' show. The Adventure time wikia has an entire page on Finn's Swords. Here is a picture of the ones he regularly uses: From Left to right:

Jan 2, 2020 · The Root Sword was the sword that Finn found in "Mystery Train," and he used it up until S3E25 "Dad's Dungeon," when he obtains the Demon Blood Sword. It has a root hilt and then the blade of a normal sword. In my opinion, this sword is the second least memorable, only to the "small sword".