The Creature Who Became The Serpent in Genesis 3

There was a creature which at the end of Genesis chapter 3 became the "serpent." This creature was the serpent at the time of Genesis 3's writing, so that author said, "And the serpent rose higher than all the creatures of the wilderness, that the Lord God created, and the serpent said to the wife, 'Did God truly say that you should not eat from all the trees of Paradise?'" The creature was not a serpent when it dealt with Adam and Eve in the Garden, but became a serpent after the curse and was a serpent at the time of the writing. Was the creature Lucifer a la Isaiah 14:12-15? It does not appear that this creature/serpent has a very good future.

While I am writing this, I am thinking how this etheric quality could be in us unto its eventually being totally vanquished from us. It is important that our etheric qualities are going/being developed in the opposite direction.