Adventure Time Season 8 Episode 14 - Two Swords Episode Title:Two Swords.Episode Description:After Finn gets fitted with a new robotic arm by Princess Bubblegum, he recounts how the grass creature, dubbed Grass Finn (voiced by Hayden Ezzy), started to become aware to the point that it began to think it was the real Finn. Grass Finn is revealed to be a reborn version of the Finn Sword mixed with the remnants of the Grass Sword when it was pierced in "I Am a Sword". Finn appeals to Grass Finn's nature and decides to let it stay with him and Jake until it figures out what to do with itself.