Ekaishin Technique: Shadow Call

is a powerful technique that allows a user to communicate with an alternative shadow world and pull one of its inhabitants into the world of Shinobi. It is unclear how this technique is executed or the requirements for it. However, it apparently takes a great deal of chakra and stamina in order to pull out an inhabitant. The inhabitant can be used for various functions such as defending, attacking, distracting, and many others.

It is unclear why but, in most cases, the user does not have full control over the shadow being. As such, bringing one from the shadow world can lead to dire consequences. In the event that the user loses control, they must send it back to the alternate world through the. It forcibly takes the shadow being and forces them through them back into the their alternate world.

The shadow beings can be used to great effect on a battlefield and can rain chaos down on the opponents. However, due to their destructive nature, they can be very powerful and can harm or kill the user. Once this happens, they are unable to return to their original world and are trapped. For this reason, this technique can be a gamble and often implemented if their is no other option left.