Shadow Dimension Technique

This technique is Shien's own version of using Jikūkan Ninjutsu. As a Space-Time technique, it literally alters the dimensions of the user's body, switching tangibility with their shadow. Resulting in their 'shadow' becoming their true body, while the body itself becomes the shadow. The result makes it to that the user's body becomes intangible itself, making it seem like all attacks pass through him. However, while this technique is in effect, the shadow on the ground becomes the user's body, so if attacked, it can hurt the user. This technique can quickly be deactivated or activated, making it hard for the opponent to land a solid hit. Attacking both the shadow and the body at once is a good way of doing so. Shien noted that the Sharingan's true potential is the ability to allow the use of Space-Time Ninjutsu, which can usually only be done through the use of the Mangekyo. Shien uses the power of his Rinnegan along with his Sharingan to give it the power needed to perform this technique, so both eyes are vital.

Trivia

 * This technique is similar to Leliel's ability, the 12th Angel in the anime series Evangelion. As the angel's body it appears as is the true shadow, while the shadow it produces on the ground is it's true body.