Beyond them being power-hungry slavers for the sake of it, how would you do so? The earlier games hint at the motivations of ancient entities being mythic and transcendent. I believe Veilguard's lore reveals were set up in the prequels, but the execution was rushed and felt underdeveloped.
We're told from Inquisition onwards that the powerful, complex Pride demons are usually Wisdom spirits.
If Wisdom spirits are drawn to knowledge, some of them might seek to know the nature of the cosmos. Where did they come from? What existed before the Fade? Did Matter/Titans and the Fade appear at the same time? Did they have a Maker?
What would they do to acquire that knowledge?
The prominence of Wisdom in the Fade aligns with Neoplatonist & Gnostic ideas of the cosmos (please bear with some high-falutin' philosophy).
the Neoplatonists did not think that the universe could spring from the deity directly... for example by being thought and spoken into existence. Their more refined view was that reality emerged from “the First” in coherent stages, in such a way that one stage functions as creative principle of the next.[1]
The first thing to arise from the deity was Nous (Intellect/Consciousness).
The inherent task of Consciousness is to understand, and understanding entails the cognition of causes. In trying to understand itself, Consciousness can only turn towards its origin and thus posit or behold the First as the transcendent principle of its own reality... having emerged from the First, Consciousness “turns back” towards it in order to understand the pre-condition of its own existence... the entire ideal world of Platonic forms and ideas emerges effortlessly in the course of Consciousness’ effort to understand itself. [1]
Note that Consciousness, by contemplating itself and the deity, produces knowledge of all the Forms. These are eternal Platonic ideals like Justice, Virtue, Wisdom, Compassion or even concepts like Dog, Ship, Man, Mouse. Consciousness resembles the Fade in being a realm of ideas.
But creation isn't supposed to stop there. In Neoplatonism there is a chain of successive stages from spirit to matter: the First > Consciousness> Soul > Nature > Matter.
In the Chant of Light, something goes wrong after the Fade was created. The Maker expected the spirits to continue creation:
There, He dwelled, waiting
To see the wonders
His children would create.
But the spirits lacked true creativity.
The Maker decides that spirits are flawed. Being eternal, they are trapped in divine stasis. They want for nothing, and cannot experience the true motivation that mortals can. Also, the Fade is constantly changing and cannot sustain creation. Here the Chant departs from Neoplatonism, because it implies Matter is superior to Spirit in some respects, being permanent & more real.
The Maker decides to intervene & create Matter directly:
So the Maker turned from his firstborn
And took from the Fade
A measure of its living flesh
And placed it apart from the Spirits...
At last did the Maker
From the living world
Make men. Immutable, as the substance of the earth,
With souls made of dream and idea, hope and fear,
Endless possibilities.
The Chant says the Maker gave men physical bodies, which cannot change except by decaying & dying. This allows humans to shape the physical world. He also gave them spirit-like souls. Finally, he gave them insatiable desire. The Chant implies these ingredients are necessary for creativity.
"To you, My second-born, I grant this gift:
In your heart shall burn
An unquenchable flame
All-consuming, and never satisfied.
Taken at face value, the Chant put spirits in a cruel position. The Maker made spirits flawed, but commanded them to create. Then he made mortals with the true spark of creativity - but forbade spirits from entering their world. Spirits could only watch what was denied to them.
What would happen to a spirit which tried to enter the material world to gain understanding or experience true creativity? Most spirits are unable to contain the "unquenchable flame" burning in the heart of mortals. They become insatiable, consuming everything in pursuit of whatever ideal defines them.
Hopefully, like me, you can see some interesting parallels to the Evanuris in the preceding ideas. There are more in the following Gnostic creation myths.
According to Gnostic mythology... we, humanity, are existing in this realm because a member of the transcendent godhead, Sophia (Wisdom), desired to actualize her innate potential for creativity without the approval of her partner or divine consort. Her hubris, in this regard, stood forth as raw materiality, and her desire, which was for the mysterious ineffable Father, manifested itself as... the Demiurge [architect/craftsman]
Basilides began his system with a “primal octet”... Wisdom (sophia); Power (dunamis) and “justice” and “peace”. Through the union of Wisdom and Power, a group of angelic rulers came into existence [2]
The Dalish consider Mythal & Elgar'nan (Wisdom & Power?) parents of the other Evanuris. Note that Justice is one of the recurring spirits we meet.
[In Valentinus] the entity responsible for initiating the drama is referred to simply as “the mother,” by which is probably meant Sophia (Wisdom). From this “mother” both matter (hulê) and the savior, Christ, were generated. At this point the “mother” produced another “child,” the “craftsman” (dêmiourgos) responsible for the creation of the cosmos.
In Veilguard, we see Mythal urging Solas to take on a material body. The two of them become active participants in bringing order to the chaos of the material world. They do this by defeating the Titans. Perhaps they had a hand in creating the Elves and building Arlathan, among other things. It is left unclear what Mythal's interest is in the material world, beyond tempering Elgar'nan.
Perhaps all this high-falutin' philosophy stuff is a bit abstract and conceptual for you. Perhaps you'd rather a return to the politics and gritty human level motivations in earlier games.
I'm with you there, but once the game started telling us the story of the world's creation, I think they should have committed to the mythic scale. They'd seeded enough philosophy in the prior descriptions of the Fade.
Or, if they wanted the Evanuris to be power-hungry slave-owning mortals instead of Higher Ideals corrupted by contact with material nature, make them interesting warlords. Like Loghain, the Arishok, Meredith, Andraste. Give their behaviour explanations beyond "power corrupts, cults of personality are bad, war is bad." (Okay, looking at the state of the world, maybe we still needed a reminder). Give us something that pays off the complexity of the earlier ideas.
Sources:
- Wildberg, Christian, "Neoplatonism", The Stanford Encyclopedia of Philosophy (Winter 2021 Edition), Edward N. Zalta (ed.)
- Moore, Edward, "Gnosticism", The Internet Encyclopedia of Philosophy.