sliced to fit a standard 3d printer and a 8mm diameter hole runs along the whole body for additional suport( recommend screwing the ieces to an M8 screw rod) The grass sword first appears in the episode Blade of Grass, where it comes to replace the broken demon sword. Finn buys the grass sword for three dollars from the Grassy Wizard. Finn discovers that the sword is cursed when it begins following him around and tries to bind to his body. When he accepts the sword's curse, he gains greater control over its abilities. Finn wore it around his arm and could extend it into a sword at his will. It ultimately ripped off Finn's right arm when it tried to save him from the Citadel in pursuit of his father Martin and some of the multiverse's worst criminals. When Finn's arm grew back in Breezy, his new arm was actually one made of grass hidden under his skin. His grass arm has the ability to burst through his skin and control itself like the grass sword. The Grass Sword can no longer be used as it took control over and manipulated the Finn Sword to make the character Fern. A reaction to when Finn tried to regain control over it so it would not kill a beloved character.