Return of the Nephilim

There is sound Scriptural proof on how Satan's angels have been able to reproduce the Nephilim in the days of Moses as well as in modern times. What is the Portal that these demons have used to bring their descendants into this world? The truth is not revealed and yes Jesus prophesied the return of the Nephilim in this day.
The beginning of sorrows is more that just wars and rumors of wars it will included satan sitting in the Temple of God, your brain through Microchip technology.