Baika no Jutsu, also known as the "Expansion Jutsu," is a technique from the Naruto anime and manga series. It allows the user to enlarge their body or specific body parts, making them significantly larger and more powerful. This technique is often used by the character Orochimaru and can be advantageous in combat situations. The technique requires a certain level of chakra control and is typically employed to enhance physical strength or create a larger target for opponents. While it can be effective in battle, it also leaves the user vulnerable to attacks due to their increased size.