Nephilim Demon Meat Suits.

They're amphibious (frogs in Revelation). Created to survive underground and to have a more hands-on effect on humans. Abduction and hybridization alongside the Mantids and tall greys. 

They abduct, impregnate and then come back and birth the offspring a few months later with accelerated gestation. 

The fallen can't concieve naturally after the flood. The Nazca mummies are the same thing and the implants are to anchor higher entities to them more securely.

[t.me/RussianBaZa](http://t.me/RussianBaZa)