Juubi, also known as the Ten-Tails, is a powerful creature from the anime and manga series Naruto. It is a massive, tree-like beast that embodies the combined chakra of all the tailed beasts. Juubi is considered a significant threat due to its immense power and ability to manipulate chakra. In the series, Juubi plays a crucial role in the storyline, particularly during the Fourth Great Ninja War. It is sought after by various characters, including Madara Uchiha, who aims to use its power to achieve his vision of peace. The creature's existence highlights the themes of power, control, and the consequences of seeking ultimate strength.