The Nephilim was one of many powerful creations made by Ares to use during the Human-Isu war.
Throughout history, there has been many accounts of such terrifying creatures that stood as tall as a mountain and with the power to destroy cities. The Nephilim was one of them
In this story, I took the idea of the Golem from Hebrew mythology and combined it with with the mythology behind the Nephilim, giants throughout the ages and from biblical times with the notion that "What if they were one and the same."