Aelin Galathynius created Prythian. She is the Mother.
This theory contains TOG, ACOTAR and (slight) CC SPOILERS!
Many, many thousands of years ago, Amren recalled that a huge "rip in the sky" appeared in her home world. Out of curiosity, Amren flew through this rip, and landed in Prythian.
This perfectly aligns with Aelin ripping a hole in the sky of the God's realm. This is the most concrete piece of evidence that Throne of Glass took place in the past (something I have already theorised about).
However, and most interestingly, it is suggested that Amren entered Prythian when it was being made - when the world itself was beginning to form.
If Aelin indeed created the "rip" in the sky that Amren went into - the timing suggests that Aelin's actions led to the creation of Prythian.
And, although subtle, we actually have proof of this.
Recall that Wyrd was described as the thing that "keeps the realms apart:"
But, when Aelin shut the gates between worlds at the end of Kingdom of Ash, we have this VERY important (and often overlooked) clue:
Aelin caused for all worlds to overlap.
I believe this is how Prythian was born.
The Cauldron.
According to the mural that Feyre observes, Prythian was created by a female with "glowing, slender hands," who tipped a fluid with "strange symbols" (wyrdmarks), from the Cauldron, onto the land.
I believe this was Aelin - perhaps not literally, but metaphorically.
But this begs the question; what exactly is the Cauldron?
For starters, we know that the Cauldron has 3 "legs". These legs provide most of its power (and this is an important clue!)
This is very similar to the 3 wyrdkeys in TOG; the very 3 wyrdkeys that Aelin embedded into her arm (and subsequently her blood) when she sealed the gates.
Aelin then gave over the 3 wyrdkeys, and all of her fire power to forge the new lock. It is this very power that is the essence of the Cauldron.
As evidence of this, when we see the Cauldron's power in ACOWAR, it presents as Aelin's own power; "raw fire power," capable of burning an entire army to ash within seconds.
The Dread Trove.
The Cauldron also created the Dread Trove - and this is another very important clue.
The Crown.
The Crown can control and influence people - just like the wyrdkeys (and subsequent wyrdcollars and rings controlled people in TOG).
The Mask.
The Mask can control the dead - just like the wyrdkeys could create armies of dead people; a power Erawan desperately wanted.
The Harp.
The Harp can open portals to different locations, and potentially different worlds and realms. This is one of the key features of the wyrdkeys.
In fact, it was said the 3 wyrdkeys were needed to create a wyrdgate.
The Cauldron has 3 legs (that I believe are the 3 wyrdkeys Aelin yielded to seal the lock).
Thus, the Cauldron *IS* a wyrdgate.
Cauldron = Wyrdgate.
As further proof of this, to "nullify" the Cauldron, Amren had to:
give up her current body,
forget about those she loved,
and unleash her power of "light and flame."
Which is just like Mala Fire-Bringer; who also had to:
give up her current body,
forget about those she loved, (in fact, both her and Amren both warned that they will no longer "remember" their loved ones),
and unleash her power of "light and flame", in order to forge the lock, and shut the wyrdgate.
But, recall that when Mala's plan didn't work, Aelin (and Dorian) had to give all of their power to reforge a new lock, in order to seal and shut the wyrdgate once more.
This is just like Rhys in ACOWAR; in order to re-seal the Cauldron, he had to give over every inch of his power.
In fact, when Aelin and Dorian's power were used together, and in combination with the wyrdkeys, it was described as "creation and destruction," and the "beginning and the ending."
These are the exact same terms used to describe the Cauldron - and I'd argue the exact same *power* of the Cauldron (but more on that later).
And, as a side note - at one point, the Cauldron's power was even described as "fire and ice"... (ring any bells?)
The Lock.
Further, when Aelin and Dorian were sealing the wyrdgate shut, they had to make a "lock."
The lock they made was the Eye of Elena. This is perhaps the most important clue in this theory; that this very symbol and mechanism allowed for the creation of the Cauldron.
However, we learn in later TOG books that this symbol isn't just known as the Eye of Elena, but also as the "Eye of the Goddess." This is because it was first a sacred witch symbol, created by Rhiannon Crochan.
Crochan means Cauldron.
Additionally, the Eye of the Goddess was named as such, as it is said to represent the Three Faced Goddess (that the witches worshipped), and her three counterparts;
The Maiden
The Mother
The Crone.
It's for this reason that I believe the Cauldron was created from the Eye of Elena, or the Eye of the Goddess lock, as it too follows the principles of Maiden, Mother, and Crone.
We see clear evidence of this when Elain, Nesta and Briallyn were thrown into the Cauldron.
Elain was made into the Maiden.
The Maiden often symbolises innocence, beauty and blossoming.
In TOG, the Maiden was represented by the Blueblood witches, who were the "oracles, mystics, and zealots."
Elain was made into a Seer.
The Bluebloods also required more iron (as it was said that they were the most powerful), and it is rather interesting that Elain (presumably) wears an iron ring.
Nesta was made into the Mother.
The Mother often symbolises maturity, responsibility, and power.
In TOG, the Mother was represented by the Blackbeak witches, who were the warriors - known for their "obedience, discipline, and brutality."
Considering the multiple references to Nesta making a fine General in an army, as well as the parallels between Manon's thirteen, and Nesta's Valkyries - it makes perfect sense.
Briallyn was made into the Crone.
She was, quite literally, turned into an old woman by the Cauldron.
Creation and Destruction.
Knowing that that the Cauldron was made from the Eye of Elena/Eye of the Goddess, as well as the 3 wyrdkeys, as well as Aelin's own power that she donated to forge the lock, and seal the gate - this can explain Nesta's own power.
Nesta's power manifested as "cold" flame, one that seemingly burned without a trace.
We have already seen this before;
Aelin's moon-fire,
and Kaltain's shadow-fire.
The commonality between these two? Both women were in possession of the wyrdkeys.
The same wyrdkeys that the Cauldron now possess; the same power that Nesta stole.
And, all in all, this makes perfect sense. The Cauldron is a wyrdgate. Wyrd is the "language of the universe," it is the power of both creation and destruction, life and death.
Nesta's power symbolises one half - Death.
And, it's for this reason that I believe that Elain's powers (that are yet to be revealed), will symbolise the other half - Life. Creation. (And, I also have an inkling that she will be the one to rebuild the Dusk Court with this very power).
We also know that the Cauldron loved Elain. If the Cauldron was indeed created by Aelin - that she is it's Mother - then perhaps it's no coincidence that "Elain" is an anagram for "Aelin"....?
A portal too?
If the Cauldron is indeed a wyrdgate - then recall that Feyre threw the Book of Breathings into it.
Now, Jesiba Roga possesses that exact book.
Does this tell us that the Cauldron is in fact a wyrdgate to Lunathion, and the Crescent City world...?
Knowing all the connections between the Cauldron and the witches - and Jesiba being a witch herself, it makes sense...
