What are the Nephilim

This is a work of fiction. It is meant to entertain, not instruct. It is not intended as a work of theology and, if it were, would fail utterly, as much of it would be really bad theology. Again: it is meant to entertain, not instruct.

I have chosen to base this off of several other works of fiction, largely because mixing the ideas from Mrs. Rowling with those from these other works is amusing. At times these choices constrain other choices I as an author might have otherwise made differently. Some of the theology here-in is really bad theology not because I could not imagine better, but because I sourced it in. I cannot fix everything without destroying the crossover feel that I am aiming for. In particular, much of the information in this section comes from, or rather is based on, Many Waters, although what I came up with dovetails nicely (or at least I think it does) with a concept I get from The Screwtape Letters concerning the morphology of angelic beings.

Recall that these appendices are written from the perspective of an in-world researcher. These in-world researchers are off stage both in the that they do not appear in the story itself, but also in the sense that they are not necessarily from the present as the characters in the story would perceive time. Not all of these researchers have written in the same style, nor have all aimed at, or achieved, any uniform level of professional scholarly writing. Most of these researchers are religious figures working for various in-world Vatican departments or commissions.

Footnotes are not part of the in-world document, despite any appearance to the contrary, and despite the fact that if this were a real document, it would have been written with real footnotes.


historical origin of the nephilim

From: \ of the Archivio Apostolico Vaticano

To: \, Provincial of the Province

Per your request, the following represents a summary of the current knowledge on the so-called “nephilim”1, specifically concerning their historical origins and characteristics.

There is no single origin of the nephilim in the sense that there is for humanity. Where humanity has, in its entirely, descended from a single set of original parents, Adam and Eve, the nephilim emerge from a variety of human communities at at variety of different points in history. Nor is it reasonable to believe that this is simply a case where one or more individuals have persisted in a community unaware of their heritage. Rather, it seems inescapable that there are, in fact and not merely in appearance, many different emergences of nephilim over history, and that each of these have come from human communities.

This many origins conclusion, with each origin dependant upon a pre-existing fully human community is fitting in several ways. One, it fits the available data in that it avoids a number of contradictions with revelation. Secondly, in that it fits with private revelation without making the believer dependant upon that revelation.

The most reasonable conclusion is that the nephilim are made and not created. This distinction is important, as the evidence strongly links the origin of the nephilim to instances where humanity has practised witch-craft, devil-worship, and other diabolic practices. One or more of these practices appears to result in the existence of the nephilim. We have reasonably complete fragments of several apocryphal sources dating from Old Testament times wherein the authors state that the nephilim are the result of some sort of “marriage ceremony” between a fallen angel and a human woman. The ceremony is not described in any of these fragments, but is, per these sources, incredibly unsettling and/or unnerving upon those who witness it. There is no evidence that directly contradicts these fragments except the reality that the fallen angels lack the power to create - hence the conclusion that the nephilim are made.

Assuming these fragments are true, and given that there is apparent confirmation that there is at least some element of truth behind them in the form of private revelation, it appears that the existence of the nephilim is intended to be a direct affront to God. It appears to be the case that they are intended to mock both God’s unique creative ability by blurring the distinction between things He has created and things subsequently derived from that creation, and God’s plan of creation in which man is to hold a unique place as the pinnacle of the material and the bridge to the spiritual.

  • The nephilim are, at least when they first emerge in a community (see below for several important caveats), visually indistinguishable from normal humans. Indeed, even today, most nephilim remain visually indistinguishable. Given that humanity is the centrepiece of God’s creation, the nephilim in and by their existence, could be said to mock that creation by duplicating His achievement. This would not be, in fact true - they are derived from humanity and thus dependant on them but truth is no impediment to the father of lies.
  • Similarly, their makers might claim that they have surpassed God’s abilities, in that the being they made is superior to that God created - the nephilim have some of the powers of the angels in limited ways, and to varied limited degrees. Again this claim is untrue. For while they do have powers humanity does not, humanity also has abilities the nephilim do not. See below.
  • Humanity is created and perpetuated through the union of man and woman. Where justice rules, this union occurs in and through marriage, and forms a symbol of the inner life of the Trinity. The nephilim mock this, in that they seem to be human, but seem equally incapable of marriage. More on this below.
  • The nephilim themselves have at times in history made things in their own image. There are a variety of creatures that now exist that have a variety of aspects of man. Either the form of man (to various degrees) without the mind (or soul), or the ability to speak like a man while retaining the form of an animal, in numerous ways the nephilim have blurred the distinction between humanity and the rest of creation.
  • The nephilim themselves now have a wide variety of morphology. Many of these phenotypes breed true, and many of them appear distinctively not-human in very noticeable ways. Many, but not all of these, correlate with changes to intellectual capacity, measurable differences in ability to make rational decisions instead of acting on pure instinct, and measurable differences in creative capacity (the ability to create art, tell stories, to create culture). In other words, in and of themselves they increasingly blur the lines between what is a being and what is an animal.

For the purposes of this summary, it will be assumed that the nephilim are in fact in some unknown way a union of human and angelic natures, inheriting aspects of each. Per your request, you are more interested in a practical understanding of what is than why we believe it to be, thus this summary does not attempt to explain where each fact is sourced from.

Characteristics of the Nephilim

As a distortion of God’s creation, nephilim do not, cannot fit cleanly into either creation or Divine Law. As best we, as researchers, can tell, Soteriology, Misology, and Ecclesiology get interesting curlicues and footnotes trying to deal with the chaotic fallout of the interaction between the angelic and the human in a nephil’s nature. The Church struggles greatly as her tribunals and as individual bishops and other Church officials have, at various times and places, been forced to adjudicate practical consequences.

In many ways a useful analogy to understand the nephilim is to first look at other, naturally occurring, hybrids. By somewhat comparing the nephilim to mules or ligers, we can approach an understand of how it is that the nephilim are at the same time in some ways more capable than humanity and in other ways less capable. It is, however, important to note that neither the nephilim themselves, nor any of the hybrids they have created, like the so called hippogriff (which figures in human mythology, but which is not in fact a mythological animal, but a very rare but very real one) do *not at all* follow normal Mendelian inheritance patterns. Or rather, they appear to selectively follow normal patterns just enough to defy formulating any alternative rules with any reliability. We have attempted to explain the rules they do follow, in so far as there are any rules, in an attached document.

The primary difference between humans and the nephilim is that the nephilim have what they call “magic.” These abilities are poorly understood by the nephilim themselves. Our understanding of their “magic” is covered in this attached document

Animagi

Apocryphal sources tell us that each angel has an intrinsic shape that it will “naturally” assume when interacting with the physical world. More accurately, it could be said to have a set of intrinsic shapes, one more or less human in appearance, and one that closely mimics a particular animal. This dual form is one of the things that the nephilim inherit from their (fallen) angelic parents. The nephilim refer to the ability to assume the shape of an animal as being an animagi, and most European nephilim will tell you that the ability is rare. It is not - all nephil are animagi.

However, normally a child, growing up around those who either do not have or do not use this power, begins to instinctively suppress the ability. Some traditions, like that described in Short Stories of Heroism (a fictional work produced for nephilim children) are time consuming, difficult, and exacting.[^220628-1] In actuality this process is used not because of the inherent difficulty of the actual magic, but rather because the nephilim believes it necessary. Functionally but unknowingly to the nephilim population (who largely have not studied any actual psychology), the ritual is training the nephil to allow the change, to overcome the enculturated inhibitions against using this power. Moreover, the nephilim’s power, which they call magic, is in part about belief, you cannot do something you believe you cannot do. Thus if you believe that the transformation is difficult, you can (unconsciously but very actually) make it difficult. This last (making magic difficult) applies to more than just animagi.

Uagadou (one of the nephilim centres for education) is known for teaching self transfiguration.2 Their results differ from the way most nephil communities handle the animagi ability. Rather than working with the student’s innate form, the Uagadou school teaches students to mutate themselves, and thus to change their innate form. They disregard the repercussions this has on the student’s core personality, and sometimes even on the person’s ability to function in normal human society.

Free Will

One of the key differences between the nephilim and humanity is that it is entirely possible for the nephilim to use their powers in ways that bind either their own will, or that of another of their kind. This is covered in further detail here and here.

In your query you relate several anecdotes noting you changed the names to protect their privacy. You should be aware that given the conclusions in the attached documents about the nature of the nephilim, it is thus not actually GirlA’s fault that she trusts books too much, nor BoyC’s fault that he cannot see past his parent’s bigotry. These are rather aspects of the fact that they are not human. This, combined with their greater average lifespan, also explains the inherent and relatively extreme conservatism of nephilim society. They are simply not capable of the rapid change that human society regularly experiences.

Physical Nature

This union also has implications on the physical form of the nephilim. Each nephilim is, as we have stated, an animagi. That is, each has a base form that more or less appears human, but has the capability to change their form into that of a particular animal. Note however that we stated that these animal forms can be changed, and that changes to these forms affect the personality of the individual. The individual’s animal form is always in at least some way a representation of that individual’s core character. Indeed, we speculate that these relationships between form and character influenced human mythology and form the basis for things like the prevalence of animal-based zodiac symbols.

The nephilim’s base form is also subject to change. Based on observational evidence, unlike the changes to the animal form, the individual cannot consciously effect long lasting or permanent change in his/her own base form. Long lasting and even inheritable changes appear to most typically happen as an unintended consequence rather than as an intended one. If private revelation is believed, we need to adjust the previous statement. Some changes are intended, but not by the individual nephilim, but rather form the result of angelic actions upon the nephilim. More disturbingly, from what several sources claim of the visions granted to them, these changes represent actions from both those who obey God and those who do not. The research team is unable to come to any agreement on if this represents an instance in which angels are acting with good but mistaken intentions, or if it represents an aspect of humanity’s limited view point (See the response given Job in the Old Testament).

In the very shape and beings of the nephilim, we can see power beyond imagining at work and at war. In the fact that these shapes are mostly static, we can infer that these powers mostly cancel each other out. Interestingly, in each case where they clearly have not canceled each other out the research team has identified a possible pattern. These changes strongly correlate with instances in which nephilim ‘magic’ had the effect of blurring the lines between animal and not-animal. From this we can infer that the balance between literally cosmic powers becomes unbalanced by things the nephilim themselves do.

The nephilim generally live longer than humans do. They generally get sick less than we do but more than not at all. When they do get sick, the disease is usually (but not always) more virulent, accompanied by clearly magical symptoms, and frequently quite deadly. Fortunately, for unknown reasons the diseases they do get seem to only affect them. There are a few exceptions to this, most notably, the nephilim are subject to an identical common cold as humanity.

The nephilim are physically more resilient than normal humans. While their dead bodies show no differences from a normal humans (except where they have been mutated per above), it is clear that something is different while they live. They survive acceleration better; they are merely bruised by impacts that would shatter human bones. They also survive physical trauma better, recovering from blood loss faster, more reliably, and more successfully than we do. They handle extremes of heat and cold better than we do, recovering from degrees of both hypothermia and hyperthermia that would be easily fatal in humans.

There is an important exception to this resilience, they appear more sensitive to lack of regular nutrition - they will not die from malnutrition the way a normal human would, but their growth (if not yet at physical maturity) is stunted more easily than that of a human child’s, and at any age they become lethargic sooner, demonstrate trouble concentrating, and pretty much every other effect of severe malnourishment that a human does - except that they do not die from it. The average nephilim appears to require on average 10 to 20 percent more calories per day, though the difference is less noticeable if the individual avoids using their “magic.” Conditions like bradycardia, gastroparesis, and others that are associated with malnutrition but are rare in humans are in fact often (not always) indicators that the child is not in fact human but might have a nephil heritage.


  1. Ms. Melissa Petruzzello. “NephilimBritannica. Last Updated 2023-07-04.

  2. Mrs. J. K. Rowling. “UagadouThe J.K. Rowling Index Published: 2016-01-31.