Adventure Time (2010)

S5E32 Earth & Water

Princess Bubblegum puts Flame Princess through a battery of challenges to assess her fiery nature. However, an unexpected crisis arises at the treehouse, prompting Princess Bubblegum to leave Cinnamon Bun in charge of Flame Princess. As the situation unfolds, her well-intentioned experiment threatens to spiral out of control, leading to unforeseen consequences.