This is about the object, you might be looking for the episode.

The Blade of Grass is a sword that was seen in the episode of the same name. It is used to replaced the Demon Blood Sword, which was broken in Play Date. It was bought by Finn. It is very sharp and can convert from a sword to a long leaf covered in his arm. It is later seen in Rattleballs where it can extend length.

Episode Appearances

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