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Shinigami (Death God)
Shinigami Location: Hidden Leaf
Classification: Death God
Character Affiliation: Third Hokage, Fourth Hokage

Shinigami
The Shinigami is a being called forth during the Shiki Fuujin jutsu.

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The jutsu to call the Shinigami forth was taught to the Third Hokage by the Fourth Hokage. Calling him forth will result in the caster's death. While the Shinigami will remove the soul of the target, it will take your own soul in exchange. Both souls will forever after be condemed to damnation, fighting eternally in the stomach of the Shinigami.

Doki (Angry Spirits)
Oni Location: Hidden Sound
Classification: Spirit/Chakra Summon
Character Affiliation: Tayuya

Oni
These summoned spirits are created by the Sound ninja Tayuya. The Doki are massless ethereal beings, existing as chakra with a need to consume.

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After being summoned Tayuya can control these Doki with the melodies of her flute. One melody will cause the oni to release their pure material ghost form from their mouth, this ethereal form can move through objects. When it comes into contact with a living being, it will eat away at their physical energy.

Umibouzu
Umibouzu Location: Sea Country
Classification: Spirit/Chakra Summon
Character Affiliation: Amachi

Umibouzu
Amachi summoned this Umibouzu (sea monster) to help him terrorize the Sea Country. Something more than sea water and something less than a sentient being, the Umibouzu is a moving water technique that obeys Amachi's command.

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The Umibouzu was eventually destroyed with the assistance of Gamabunta. He used his toad oil and flame from Naruto to incinerate the water.

Ido (id)
Ido Location: Hidden Leaf
Classification: Entity
Character Affiliation: Yakumo
Note: The id is one of the three divisions of the psyche in psychoanalytic theory that is completely unconscious and is the source of psychic energy derived from instinctual needs and drives.
Yakumo
Kurama Yakumo was the hope of her clan. Known for their Genjutsu specialty, many of the clan members had not advanced in rank in Konoha in numerous years. Yakumo was placed under Yuuhi Kurenai in the hopes she could help teach Yakumo how to excel in Genjutsu. Unfortunately Yakumo's enormous Genjutsu talent was too much for the young woman. All the pressure on her to be the shining hope of her clan had created a separate entity in her subconscious mind. This Ido being sought to destroy Konoha and unleash its' powers.

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Fearing what the Ido monster would do to Konoha, the Third Hokage ordered Yakumo's powers sealed away. Yakumo took the news harshly and allowed the Ido monster to emerge without her being aware. The monster caused the death of her parents and Yakumo believed they had been assassinated by the Third Hokage. Yakumo's powers were eventually sealed away and she was placed outside the village under watch. She began to grow angry at the confinement and sought revenge against Kurenai. After luring Kurenai into a trap, she saw how her former teacher cared for her. She soon learned the truth of her parent's death and watched in horror as the Ido monster emerged in one of her illusions. With encouragement from Kurenai, Yakumo was able to finally take control of herself and kill the Ido.

I'll take the Ido....My clan is responsible for it after all....

your clan is not made yet but yeah you can have it