Genesis 6, verses 1-13
1
And it came to pass, when men began to multiply on the face of
the earth, and daughters were born unto them,
2
That the sons of God saw the daughters of men that they were
fair; and they took them wives of all which they chose.
3
And the LORD said, My spirit shall not always strive with man, for
that he also is flesh: yet his days shall be an hundred and twenty
years.
4
There were giants in the earth in those days; and also after
that, when the sons of God came in unto the daughters of men,
and they bare children to them, the same became mighty men
which were of old, men of renown.
5
And God saw that the wickedness of man was great in the
earth, and that every imagination of the thoughts of his heart was
only evil continually.
6
And it repented the LORD that he had made man on the earth,
and it grieved him at his heart.
7
And the LORD said, I will destroy man whom I have created from
the face of the earth; both man, and beast, and the creeping
thing, and the fowls of the air; for it repenteth me that I have
made them.
8
But Noah found grace in the eyes of the LORD.
9
These are the generations of Noah: Noah was a just man and
perfect in his generations, and Noah walked with God.
10
And Noah begat three sons, Shem, Ham, and Japheth.
11
The earth also was corrupt before God, and the earth was filled
with violence.
12
And God looked upon the earth, and, behold, it was corrupt; for
all flesh had corrupted his way upon the earth.
13
And God said unto Noah, The end of all flesh is come before
me; for the earth is filled with violence through them; and, behold,
I will destroy them with the earth.

Who are the Nephilim?

Nephilim are beings who appear in the Hebrew Bible, specifically they are mentioned in the Book of Genesis and Numbers; they are also mentioned in other Biblical texts and in some non-canonical Jєωιѕн writings.

What does the word "Nephilim" mean?

The Hebrew word nephilim may mean "those causing others to fall".
Abraham ibn Ezra proposes that they were called this because men's hearts would fail at the sight of them. Jean Leclerc and Peter of Aquila among others suggest that it is derived from the warlike nature of the Nephilim, comparing the usage of Naphal in Job 1:15 "And the Sabeans fell upon them" where Naphal means "to take in battle". Alternatively, Shadal understands nephilim as deriving another possibility is from the Hebrew word ‫ פלא‬Pela which means wondrous. which is consistent that the term is a generic term for "giants" in general, with the Septuagint and Vulgate translations of the word. Some expositors believe it may refer more to the ferocity and strength of the people who are referred to, rather than their physical height, though in the Book of Numbers intentional stress on height is apparent, whether metaphorical or actual.

What kind of interpretation may have the Nephilim in the Context from the Bible?

There are three common views regarding the identity of the Nephilim.
1. They were the offspring of fallen angels and human women.
2. They were the hybrid offspring of descendants of Seth with those of Cain.
3. They are not historical figures and are ancient imagery with questionable meaning.

I strongly believe the First interpretation is the correct one:

Offspring of Fallen Angels

The Targum Jonathan states that the Nephilim were given this name because they were descended from fallen angels.

The New American Bible commentary draws a parallel to the Epistle of Jude and the statements set forth in Genesis, suggesting that the Epistle refers implicitly to the paternity of Nephilim as heavenly beings who came to earth and had sɛҳuąƖ intercourse with women. The footnotes of the Jerusalem Bible suggest that the Biblical author intended the Nephilim to be an "anecdote of a superhuman race". Genesis 6:4 implies that the Nephilim have inhabited the earth in at least two different time periods—in antediluvian times "and afterward." If the Nephilim were supernatural beings themselves, or at least the progeny of supernatural beings, it is possible that the "giants of Canaan" in Book of Numbers 13:33 were the direct descendants of the antediluvian Nephilim, or were fathered by the same supernatural parents.

In other texts

The story of the Nephilim is chronicled more fully in the Book of Enoch (part of Ethiopian biblical canon). Enoch, as well as Jubilees, connects the origin of the Nephilim with the fallen angels, and in particular with the Grigori (watchers).

Samyaza, an angel of high rank, is described as leading a rebel sect of angels in a descent to earth to have sɛҳuąƖ intercourse with human females:

Quote from: Wikipedia quoting Book of Enoch

And it came to pass when the children of men had multiplied that in those days
were born unto them beautiful and comely daughters. And the angels, the
children of the heaven, saw and lusted after them, and said to one another:
'Come, let us choose us wives from among the children of men and beget us
children.' And Semjaza, who was their leader, said unto them: 'I fear ye will not
indeed agree to do this deed, and I alone shall have to pay the penalty of a great
sin.' And they all answered him and said: 'Let us all swear an oath, and all bind
ourselves by mutual imprecations not to abandon this plan but to do this thing.'
Then sware they all together and bound themselves by mutual imprecations
upon it. And they were in all two hundred; who descended in the days of Jared
on the summit of Mount Hermon, and they called it Mount Hermon, because they
had sworn and bound themselves by mutual imprecations upon it...

According to these texts, the fallen angels who begat the Nephilim were cast into Tartarus/Gehenna, a place of 'total darkness'. However, Jubilees also states that God granted ten percent of the disembodied spirits of the Nephilim to remain after the flood, as demons, to try to lead the human race astray (through idolatry, the occult, etc.) until the final Judgment.

In addition to Enoch, the Book of Jubilees (7:21-25) also states that ridding the Earth of these Nephilim was one of God's purposes for flooding the Earth in Noah's time. The Biblical reference to Noah being "perfect in his generations" may have referred to his having a clean, Nephilim-free bloodline, although it may be inferred that there was more diversity among his three daughters-in law.
These works describe the Nephilim as being evil giants.

Putting all of this together, I conclude that fallen angels (aka demons) did interbreed
with humans during the Times of Noah leading to a lot of trouble that ended up on the Big Flooding.

3. On the Future, just before Jesus Christ Second Coming.

Revelation 16. Verses 13-19.
13
And I saw three unclean spirits like frogs come out of the
mouth of the dragon, and out of the mouth of the beast, and out
of the mouth of the false prophet.
14
For they are the spirits of devils, working miracles, which go
forth unto the kings of the earth and of the whole world, to gather
them to the battle of that great day of God Almighty.
15
Behold, I come as a thief. Blessed is he that watcheth, and
keepeth his garments, lest he walk naked, and they see his
shame.
16
And he gathered them together into a place called in the
Hebrew tongue Armageddon.
17
And the seventh angel poured out his vial into the air; and
there came a great voice out of the temple of heaven, from the
throne, saying, It is done.
18
And there were voices, and thunders, and lightnings; and there
was a great earthquake, such as was not since men were upon
the earth, so mighty an earthquake, and so great.
19
And the great city was divided into three parts, and the cities of
the nations fell: and great Babylon came in remembrance before
God, to give unto her the cup of the wine of the fierceness of his
wrath.

Here we have three very strange characters leading to the same "biggest trouble ever in World's History". But they are described on a different, and perhaps even strange way here.

" 13
And I saw three unclean spirits like frogs come out of the
mouth of the dragon, and out of the mouth of the beast, and out
of the mouth of the false prophet.
14
For they are the spirits of devils, working miracles, which go
forth unto the kings of the earth and of the whole world, to gather
them to the battle of that great day of God Almighty".

Frogs?, why "three unclean spirits like frogs"?

Here you can see that whatever the Frogs may be, they will do war against God. These Frogs are playing here the same "war-against-God" role from the Nephilim found on the Book of Genesis.
They are described on a different way, but we are told that they are "unclean", just like the Nephilim. This lead me to believe that a demonic-human interbreeding is going to happen, or is perhaps already happening.

I believe the Bible does not add words "just because", so if the Book of Revelations says: "like Frogs", then it means that this is very important to know. Assuming that the "Spirit like Frogs" are at least playing a similar role to the Nephilim, I would expect them to interbreed, then "like Frogs" makes a lot of sense.

Perhaps this actually meant "three unclean spirits that reproduce (or interbreed) like frogs".

How do Frogs reproduce?

Life Cycle and Reproduction from Frogs.

The life cycle of frogs, like that of other amphibians, consists of four main stages: egg, tadpole, metamorphosis and adult. The reliance of frogs on an aquatic environment for the egg and tadpole stages gives rise to a variety of breeding behaviors that include the well-known mating calls used by the males of most species to attract females to the bodies of water that they have chosen for breeding.

Life Cycle

The life cycle of a frog starts with an egg. A female generally lays frogspawn, or egg masses containing thousands of eggs, in water.

Eggs hatch and continue life as tadpoles (occasionally known as polliwogs), which typically have oval bodies and long, vertically-flattened tails. As a general rule, free living larvae are fully aquatic. They lack lungs, eyelids, front and hind legs, and have a cartilaginous skeleton, a lateral line system, gills for respiration (external gills at first, internal gills later) and tails with dorsal and ventral folds of skin for swimming. Tadpoles also lack true teeth, but the jaws in most species usually have two elongate, parallel rows of small keratinized structures called keradonts in the upper jaw while the lower jaw has three rows of keradonts, surrounded by a horny beak, but the number of rows can be lower or absent, or much higher. Tadpoles are typically herbivorous, feeding mostly on algae, including diatoms filtered from the water through the gills.

The tadpole stage may be as short as a week. With the exception of the base of the tail, where a few vertebral structures develop to give rise to the urostyle later in life, the tail lacks the completely solid, segmental, skeletal elements of cartilage or bony tissue that are so typical for other vertebrates, although it does contain a notochord.

At the end of the tadpole stage, frogs undergo metamorphosis, in which they transition into adult form. Metamorphosis involves a dramatic transformation of morphology and physiology, as tadpoles develop hind legs, then front legs, lose their gills and develop lungs. Their intestines shorten as they shift from an herbivorous to a carnivorous diet. Eyes migrate rostrally and dorsally, allowing for binocular vision exhibited by the adult frog. This shift in eye position mirrors the shift from prey to predator, as the tadpole develops and depends less upon a larger and wider field of vision and more upon depth perception. The final stage of development from froglet to adult frog involves apoptosis (programmed cell death) and resorption of the tail.

After metamorphosis, young adults may leave the water and disperse into terrestrial habitats, or continue to live in the aquatic habitat as adults. Almost all species of frogs are carnivorous as adults, eating invertebrates such as arthropods, annelids and gastropods.

Reproduction of frogs

Once adult frogs reach maturity, they will assemble at a water source such as a pond or stream to breed. Many frogs return to the bodies of water where they were born, often resulting in annual migrations involving thousands of frogs.

Once at the breeding ground, male frogs call to attract a mate, collectively becoming a chorus of frogs. The call is unique to the species, and will attract females of that species.

The male and female frogs then undergo amplexus. This involves the male mounting the female and gripping her (sometimes with special nuptial pads) tightly. Fertilization is external: the egg and sperm meet outside of the body. The female releases her eggs, which the male frog covers with a sperm solution. The eggs then swell and develop a protective coating. The eggs are typically brown or black, with a clear, gelatin-like covering.

Some people have been wondering about how spiritual beings like "Angels" or "Fallen Angels" (aka demons) may take physical form. The First Article I posted dealt mainly with the power that both Angels and demons have over the Physical World.

We tend to imagine that spiritual demons would need to become Physical in order to interbreed with humans, I believe that is not the case. Humans are both Physical and Spiritual beings, so all what demons need to do in order to interbreed with humans is to attack people during their sleep.

Like this, the sleep-World would be somehow analogue to the Water in the case of Frogs, and some kind of Metamorphosis process would later on allow the demon-human hybrids to come into the Physical World, so this is what the alien abduction phenomenon is really about.

Before I elaborate more about this hypothesis, I'd like to show you something more:

"three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet".

Dragon, Beast, and False Prophet...

The Unclean Spirit like Frog that came out of the mouth of the Dragon are the so called Reptilian Aliens.
The Unclean Spirit like Frog that came out of the mouth of the Beast are the so called Grey Aliens (aka Lam).
The Unclean Spirit like Frog that came out of the mouth of the False Prophet are the so called Preying Mantis (aka Insectoid) Aliens.

Alien Abductees only describe those three type of Aliens. I can, and I will show some references that confirm that particular statement on a future post.