Using Izanagi, a user can alter reality or you can say that the caster can turn illusions into reality and the user can be brought back to life.
Unlike normal clone jutsu this technique allows its user to multiply his body many times. It consumes a lot of chakra because of that it was classified as forbidden jutsu.
For using this technique, its user had to store a large amount of chakra for many years and then release it at one, providing them great strength and power.
Only Deidara used this technique in Naruto. He used to combine his kekkei Genkai with this forbidden technique to shape his clay according to his will.
Using this forbidden technique, a user can bring people back to life. It was created by the second Hokage and modified by Orochimaru and Kabuto.
This was one of the strongest sealing techniques in Naruto. Its user can extract the souls and seal them inside the Shinigami at the same time caster also loses his soul.
Might Guy had learned this technique from his father and later mastered it. This technique multiplies its user strength and power to its fullest extent.
Someone with Rinnegan can only perform this technique. Using this, a user can bring bead people to life, unlike Edo Tensei this technique brought back people to their mortal bodies.