Satan's plan has always been to corrupt the bloodlines of humans in order that he may attwmpt to change the prophecy of Eve's seed (JESUS) crushing satan's seed (Gen 3:15), the offspring GOD knew satan would raise up by having his fallen angels mate with human women (Gen 6:1-2, 4), resulting in hybrid offspring, giants, thus corrupting the human bloodline. But GOD set Noah apart and found him blameless (Gen 6:9), as in, an uncorrupted bloodline, and this is why HE saved him. The flood GOD sent was to destroy the corrupt seeds/bloodlines/offspring of the fallen angels and women. But because it was the spirits in the offspring, spirits cannot die, and so they remained even after the flood and the hybrid mating continued. For example, Goliath and his brothers were Nephilim. There have been many bones found even to this day of giants. Just do a little research. .
The Nephilim hybrid seed of satan will soon RETURN upon this earth to destroy and devour those not under the BLOOD of JESUS. They were real and are still real. They eat flesh and drink blood. Read Gen 6. This is not folklore or tales, but truth. JESUS said when HE returns it will be as in the days of Noah. And Gen 6:1-4 clearly states the Nephilim were alive in those days. This may sound crazy but so not be so quick to dismiss it just because u haven't yet learned about it. Demons are real. The battle between GOD & satan IS real and their goal is your Soul!!
Look up Steve Quayle, Tom Horn on YouTube. Be open to learning what GOD said would happen. It is written that men's hearts will fail them to see what comes upon the earth. The great Deception is almost here. Be ready for you have been Warned!!!