Blade of Grass
Finn and Jake decide it's time for Finn to get a new sword. Finn reluctantly buys a grass sword from a mysterious old man, but the sword turns out to be cursed! And unfortunately for our hero, all sales are final.

Cast
Jeremy ShadaFinn the Human (voice)
John DiMaggioJake the Dog (voice)
Tom KennyIce King (voice)
Hynden WalchPrincess Bubblegum (voice)
Olivia OlsonMarceline the Vampire Queen (voice)
Niki YangBMO / Lady Rainicorn (voice)
Pendleton WardLumpy Space Princess (voice)
Polly Lou LivingstonTree Trunks (voice)Adventure Time on tvt

