I know that Madara used Transcription Seal: Izanagi to fake his death and came back to life after a while. What was the trigger for this jutsu (Izanagi)? If it was his death, immediately he would've come back to life after death and Hashirama would've noticed it.
It is mentioned that he had used this jutsu on his own right eye. How come a dead person's eye is a trigger for his own revival? As I understand, there won't be any movement/thought from a dead person.