Limbo: Border Jail

Limbo: Border Jail is a technique which uses the power of the Rinnegan.

Usage
The user projects a shadow of themselves into the invisible world known as. The shadow is generally impossible to detect or visually perceive without the Rinnegan. This can operate independently of the user and attack or restrain target(s), or defend the original body from attacks as the shadow was strong enough to repel all nine tailed beasts in a single instance. All the while to the naked eye, it appears to be the act of an invisible force. However, Naruto Uzumaki gained the ability to sense its presence after receiving the chakra of all nine tailed beasts and half of the Sage of the Six Paths' power while Sasuke, with the other half, is able to see the clone perfectly with his Rinnegan. With only one Rinnegan, Madara can only produce one shadow. With both his Rinnegan however, the numbers increase to at least five. Later, Sasuke comments that Madara has four shadows in every direction, which would bring the total up to sixteen.

Drawbacks
Although it is to be invulnerable to most physical attacks, techniques which make use of the Sage of the Six Path's chakra can cause harm to the shadow. The downside to this technique is that the user's shadow, after a set period of time, automatically returns to their body and it is left temporarily unusable. The shadow can be partially combated by immobilising or sealing the body in a way that it cannot move, act, or be recalled by their body. Although this does not truly defeat the shadow, it is effective at neutralising the immediate threat it poses in battle. If the opponent can also use a physical clone technique and detect the shadows, they can fully distract the clones while the real opponent engages the user, significantly reducing the effectiveness of the technique.

Trivia

 * Both the first word's furigana and the second word  refer to Limbo, with リンボ being the Japanese way of writing Limbo and 辺獄 being an actual translation of the word's meaning.