According to the material compiled by Lawrence Spencer, the Domain Expeditionary Force (the good ET's) refer to planet Earth's prison keepers as "Brothers of the Serpent"- BOTS. Their symbology is visible at several archaeological sites around the world.

In this UFO case presented by Preston Dennett, a Japanese boy is told to focus on Abraham. I would love to know the connection!

The serpent is a symbol for the DNA manipulation capabilities. The serpent is the poisonous form of the snake, meaning it is not respecting that you own yourself. The goal of the manipulation is absolute control over the body without being subject to higher natural law. It's that aggressive nature that makes them the bad guys.

Perhaps serpent is a universal description of the reptilian humanoids?

Serpent was always transcribed by the ancient as "transformation", it symbolizes it on a genetic and spiritual level.. the shedding of the skin, meaning the changing of the dna structure in it's own cycles, it's also a good part of the visualization experiences with "shamanic medicine", referring to the reptilian characteristics of the human body and the red blood we contain, which is also a depiction of our "level" of the genetic blueprint, differences of the blue blood with red.