Reaper Death Seal

Overview
The Reaper death seal is a sealing technique developed by the Uzumaki clan to call upon the power of the Shinigami King. Its very existence is so secret that barely anyone in the land knows anything about it.

Hand Seals/Requirements:
Requirements: Hand Seals:
 * Human Sacrifice
 * Uzumaki Blood

Serpent, Boar, Ram, Hare, Dog, Rat, Bird, Horse, Serpent, Clap Hands

Acquisition
After the hand seals are performed, the user's soul is partly separated from their body and suspended behind them. Behind their soul appears the Shinigami God, which restrains their soul with its hair. Only the summoner is able to see the Shinigami God at this point. After a few moments, the Shinigami God wraps its left arm with prayer beads and chants unintelligibly until a cursed seal appears on its arm. It then drives its arm into the summoner's soul, thus allowing the summoner to call upon the Shinigami God to seal a target: the Shinigami's arm emerges from the summoner's body and grasps the target's soul. When Mukai Uzumaki performs it, he is required to get close to his target in order to initiate the seal. When Stan Uzumaki performs it, he is able to remain at a distance. Targets are able to see the Shinigami so long as it's in contact with their soul.

While the Shinigami grabs their soul, the target is immobilised, any jutsu they may be using are dispelled, and they are prevented from performing additional jutsu. With targets unable to escape or fight back, the summoner can remove and seal their soul. Mukai was able to seal multiple souls by using this technique in conjunction with the Shadow Clone Technique. The sealing, however, is not necessarily complete nor automatic: The target's soul is sealed within the body of the summoner, represented by a swirl pattern on their torso that is similar in appearance to the Eight Trigrams Sealing Style. In Stan's case, this sealing of the Hybodus's yin chakra into himself makes him its jinchūriki. With the sealing completed, the Shinigami gradually starts consuming the summoner's soul. The summoner can, with difficulty, continue moving and speaking, allowing them to finish any lingering business they may have, but they will die as soon as their soul has been fully consumed. The souls of the summoner and their victim do not pass on to the Pure Land, instead being trapped within the Shinigami's stomach, destined to fight each other for all eternity.
 * When Stan uses it, he seals only the Hybodus's yin chakra, leaving its yang chakra alone.
 * When Mukai used it on Stephanie, he had to rely on his own physical strength to extract Stephanie's soul. Because he lacked the strength to fully remove it, he opted instead to only seal Stephanie's arms, accomplished by having the Shinigami cut off the arms of Stephanie's soul.