Prophecies
Yahweh God said to the serpent, "Because you have done this, you are cursed above all livestock, and above every animal of the field. You shall go on your belly and you shall eat dust all the days of your life. I will put hostility between you and the woman, and between your offspring and her offspring. He will bruise your head, and you will bruise his heel."
Here the mythological element of the legend explains why we have a natural aversion to snakes, and then we move into what commentators regard as prophetic. The offspring of a woman will become a saviour to destroy the power of evil, though only at the cost of himself suffering. Christian commentators see this as a reference to the saving death of Christ, though obviously to the first readers of this legend that would be far from clear. The main reason why the majority of his contemporary Jews rejected Jesus of Nazareth was because they could not get their heads round the idea of their Messiah being anything other than a victorious warrior, ridding them of the Roman occupiers of their land. A suffering servant was out of the question for most of them.
So, retelling without the mythological serpent element:
Eve was told that one of her descendants would give birth to a saviour who, at a cost of suffering, would overcome the source of evil.