Board Thread:Theories and Speculation/@comment-26636534-20150921160743/@comment-734582-20150923202224

JOA20 wrote: As far as I understood, Izanagi revives the user by denying the cause of death. Meaning, for a jinchūriki to avoid death by tailed beast extraction, Izanagi would make it so that the extraction never happened. Same for the Rinne Tensei. But Izanagi works only in one's personal space. And it needs to be activated beforehand, and at a cost. I'd imagine that undoing a sacrificial jutsu would require that cost to undo it, and thus it would fail. E.g. if you die when low on chakra, you'd need chakra to undo that, which you cant (creating a circular loop) thus the jutsu fails. Undoing Rinne Tensei would essentially require a sacrifice of equivalent lifeforce to undo it. Minor injury (like simply being hurt) is undone by chakra, but it seems very doubtful that being hurt by something chakra can't really replace is so easily undone.