The Legend of Korra is a good choice for confident learners looking for more realistic and demanding listening practice. The vocabulary is not overly technical, though it includes enough variety to make the practice meaningful. Some parts may require more focus, but the main story remains easy to follow. At an average of around 108 words per minute, the dialogue is generally manageable, though some exchanges require more attention. If your English is close to B2/C1, The Legend of Korra can be useful for building confidence with more complex narratives.