User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-104.7.80.176-20150724182044/@comment-26285797-20150727134149

In theory. All he's been shown doing is entering other people's dreams. I was just imagining (imagining the dream, lol), what he could do and Izanagi just seemed to be the first thing that came to mind.