^Dude, I don't know how veritable naruto wiki and those sites are but this is what it says...

"Izanagi is a genjutsu that is cast on the user instead of others and is the most powerful amongst this type of genjutsu.

When activated, the caster removes the boundaries between reality and illusion within their personal space. To a degree this allows the user to control their own state of existence, but it is normally only active for the briefest of moments.

While the user remains physically real while fighting, this technique is capable of turning any occurrence including injuries and even death inflicted upon themselves while the technique is active into mere "illusions". Whenever the user receives a fatal injury, he or she automatically fades away as though they were an illusion all along and then returns back to reality; physically real and unscathed. The technique is based on an ability the Sage of the Six Paths had, referred to as "Creation of All Things" (万物創造, Banbutsu Sōzō). The process he used is explained to have initially involved the administration of imagination, and the spiritual energy which forms the basis of Yin chakra to create shape and form from nothingness. Then, through the application of vitality, and the physical energy which forms the basis of Yang chakra, he would breathe life into the prior form. Thus, a technique with the power to turn imagination into reality was born, known as Izanagi."

From this, it can be said that Izanagi was based on BS, with BS being the jutsu that the Sage used himself. 'Creation Of All Things' was a two part process, the applicability of one half of which is similar to Izanagi.

The Sage himself was never said to have used Izanagi...