Board Thread:Theories and Speculation/@comment-26005711-20150719134117/@comment-26665178-20150809173205

Nano555 wrote: Nagato use this technique in large scale almost no chakra (invasion of Konoha and his fight with Naruto), Nagato with full reserves is another history, and Sasuke has chakra reserves on the Nagato level or higher, and for a good cause Naruto could help Sasuke with his chakra, Naruto managed to save Guy and Obito.Sasuke could revive his clan.

This techquie doesnt cause death because of chakra take. It always causes death just by using it. Also Naruto didnt save obito, he just made it so he would live a bit longer.