Adventure Time Review: S10E5 - Seventeen

Finn Mertens turns 17! How far our hero has come since the start of Adventure Time. His birthday party in the Candy Kingdom (to which Huntress Wizard seemed to get an exclusive invite) is interrupted when a green knight on a metallic horse barges in. Gumbald finally launches war on Princess Bubblegum, with a modified Fern as his bioweapon.
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