The Dark History of the Uchiha: the bloodline of Tengu

portugues:
Bem pessoal isto levoume um bom bocado de tempo a ler mas é bastante interessante é sobre uma teoria acerca da historia do sharingan

http://forums.narutofan.com/showthread.php?t=106576

English:
well people this had taked me a big piece of time reading this but its very interesting its about one theory about the history of the sharingan

http://forums.narutofan.com/showthread.php?t=106576