ANIME

"Chakra has the power to connect the world of the living and the afterlife. As the deceased Obito explains this to Rin, he turns his chakra into a residual aura and speaks to Kakashi in the spirit realm. The Sharingan that Kakashi possesses in his left eye was given to him by Obito as a gift to celebrate his promotion to Jonin. This time, Obito's last wish is for Kakashi to become the sixth Hokage, and he leaves him with an early inauguration gift of the Mangekyo Sharingan. Once famed across nations, ""Kakashi the Sharingan Warrior"" is born anew!"