Dead Demon Consuming Seal

The Dead Demon Consuming Seal is a seal which invokes the power of the. Once called upon, the death god hovers behind the user and wraps its left arm with prayer beads, which causes a seal to appear on it. The soul of the summoner is also seen along with the death god, restrained by its hair but still attached to the user. The death god then inserts its arm into the user's soul. At this stage only the user can see the death god. To perform the seal the user need only grasp the target. The death god's arm extends from their chest and grabs the soul of the target, immobilizing them and allowing them to see the death god as well. The death god then performs the sealing. It is also possible for the user to seal multiple targets through the use of shadow clones. When Hiruzen used it, he had to get close to his targets in order to perform the sealing, a restriction that Minato didn't have, the death god's hand extending from him until it reached the Nine-Tailed Demon Fox.

If the user cannot pull out their target's entire soul, he can have the death god use its knife to sever a piece of the soul and seal it. The part sealed will suffer from necrosis, causing extreme pain and leaving the target unable to use the corresponding body part. Orochimaru however, believed the world's greatest medical-nin Tsunade, could heal the damage the seal caused to his arms.

Soon after the sealing is completed the death god consumes the souls of the user and the sealed, sentencing them to be locked in combat within its stomach for all eternity. A seal is left on the stomachs of those that have had something sealed within them using this jutsu. There is a limit to how much chakra can be sealed by the Dead Demon Consuming Seal, Minato Namikaze explained how it was physically impossible to seal away all of the Nine-Tails' chakra, opting instead to seal half within the death god along with himself, and the other half in Naruto Uzumaki.

Trivia

 * Those who have had their souls sealed by this technique can't be brought back by Summoning: Impure World Resurrection.
 * Minato seems to imply that it is impossible for a jinchūriki to perform the seal, though it is unclear what he means. (Although, this may be due to the fact the tailed-beast, in it's attempt to save itself, will prevent their jinchuriki from using the seal)