Jiongu: The Threads of Fate

After the night of the Kyuubi attack, the grief of the civilians is more than Hiruzen ever could've expected, and infant Naruto is mortally injured. In an effort to save his life, the Hiruzen uses a terrible kinjutsu to make him a host to the living threads of the Jiongu, with unexpected consequences. Warning: will contain slight body horror and graphic depictions of violence