This jutsu allows the user to create one or more copies of themselves. The user's chakra is evenly divided between themselves and their clones: creating one clone will give it half the user's chakra, creating two clones will give each a third of the user's chakra, and so on. Depending on how much chakra the user has and how many clones they make, this rapid depletion of their reserves can be dangerous.
Unlike the basic Clone Technique, shadow clones are physically real. They possess the same clothing, damage, and transformations as the user at the time of their creation. Most tools and weaponry are copied when the shadow clones are created, but highly complex ones are not.