Izanagi, named for a god who helped spawn
many islands and deities, is a Genjutsu technique
which was declared a Kinjutsu by the Uchiha Clan.
Using Izanagi grants the user the ability to turn
wounds and disadvantages into nothing more
than dream. It also makes attacks and advantageous maneuvers real, thus giving one
complete control over their own reality through
an illusion cast on themselves. The creative power
of Izanagi was first used the Rikudou Sennin.
Izanagi uses the mind and spiritual power of Yin
to shape reality, and the vitality and physical power of Yang to give it life. The Rikudou used
that same power to create the Bijuu from the
Juubi. The Rikudou's powers were passed on to
the Uchiha and Senju, and only one containing
both of their power can use the jutsu. When jutsu is cast on one's own self, any damage
received while it is active is negated. Their
crippled form will shudder away like an illusion
into nothingness while they appear unharmed
away from the danger. For those who do not
possess the Rinnegan, using the jutsu has a drawback, as using the jutsu will cause their
vision to be lost forever. This result caused the
Uchiha to declare it forbidden. The jutsu normally has a short time limit which
varies from Uchiha clan member to clan member.
This was extended through the experimentation
of Orochimaru, which granted almost a minute of
immortality for each eye sacrificed. This was used
to full effect when ANBU Root leader Danzou had a portion of Senju Hashirama and numerous
viable Sharingans implanted in his right arm. This
extended time was active at the cost of an
ongoing drain on Danzou's chakra. So when
active, it allowed him to absorb numerous fatal
attacks at the cost of one of the Sharingan eyes permanently closing on his arm and becoming
useless. Should Danzou need to conserve chakra
and protect the eyes, he would cancel the jutsu
and attempt to avoid critical hits. that is what izanigi does so what izanami does while your guess is as good as mine.
