#daglan

So the asteri corrupted the cauldron with their magic.

I believe Nesta took the asteri magic. That's why she can use the dread trove which they created. All the troves at once.

The Powers she gave up were the asteri magic that would have destroyed her. She still has partial asteri magic. That's why she can use the mask in hofas. Star born power perhaps. Maybe she became Star born.

Helion doesn't like the dread trove. I don't think Elain would have been able to yield them.

Elain must have awoken the goodness in the cauldron. That created life with the mother.

I believe her powers will have to deal with time too. Seeing the past, present, and future .

Adding onto my theory bryaxis winnowed Elain to the king.

Bryaxis was protecting Graysen after the king was killed. Protecting the mortals.

Cassian’s breath caught in his throat. “It was a fluke, Amren. Nesta didn’t make it on purpose.” Amren shook her head, hair swaying. “Nothing is a fluke. The Cauldron’s power flows through Nesta, and could use her as a puppet without her knowledge. It wanted those weapons Made, and thus they were Made. It wanted Rhysand to have them and thus the blacksmith brought them to you. - ACOSF, chapter 42

Finding the link would be basically impossible at this point, but I've previously mentioned that I wonder if the Cauldron's dark maker could be Koschei, or another death god/Daglan. To briefly rehash my thoughts: if there is a dark maker, it stands to reason there be a light maker, too… is it the Mother? Could Koschei be the dark mother that the Naga referred to in ACOTAR, as the terms “mother” and “maker” could demonstrate in-universe evolution of the same word? I've also previously theorised that Koschei may have been controlling the Cauldron through the King of Hybern/vice versa, and that is how the Elucien bond came to be, but this is not a shipping post, sorry!

As a quick aside, the above passage also makes me wonder if the Cauldron, or one of its hypothetical makers, wanted the Archeron sisters Made - it's something I've meant to post about, but I think Koschei has had a hand in things since Papa Archeron’s ship was lost at sea, at the very least. They are each a weapon in their own right, as Amren went on to state their powers match Rhys’ own. I know @nikethestatue has had similar thoughts. But I digress.

Look at the use of “bird in a cage” in the following passage, used to describe Nesta, which parallels nicely with Thesan’s use of decorative birds in cages as spies to listen in (thank you so much to @ladynightcourt3 for the first quote).

The amusement only grew, and Helion pushed a finger against his lips in mock warning. “Careful, High Lady. Even the birds report to Thesan here.” I frowned at the birds in cages throughout the room, still silent in Azriel’s shadowy presence. I threw shields around them, Rhys said down the bond. - ACOWAR, chapter 47

“Like calls to like,” Amren countered. “You were Made by the Cauldron. You may track other objects Made by it as well, as Briallyn can. And because you are Made by it, you are immune to the influence and power of the Trove. You might use them, yes, but they cannot be used upon you.” A glance to Elain. “Either of you.” Nesta swallowed. “I can’t.” But to let Elain involve herself, jeopardize her safety— Amren said, “You tracked the Cauldron—” “It nearly killed me. It trapped me like a bird in a cage.” Elain said, “Then I will find it. I might require some time to … reacquaint myself with my powers, but I could start today.” “Absolutely not,” Nesta spat, fingers curling at her sides. “Absolutely not.” - ACOSF, chapter 21

I think Nesta briefly (I hope, though who knows) became a puppet/shell for the Cauldron's puppet master - perhaps a death god such as Koschei, if @fawnandshadows is correct that he bastardised the Cauldron in some way, millennia ago (I think she's onto something) - and that's who we were seeing when she locked herself into her mind while scrying in ACOSF.

“Get her out, Rhys,” Cassian demanded. “Get her out now.” “I can’t,” he said softly, his power a cloak of stars and night around him. “I— The doors to her mind were open the other night. They’re shut now.” “She doesn’t want it seeing her. Or us,” Feyre said, her face tight. “She’s locked it out, but also locked herself in.” Cassian’s stomach twisted. “Nesta,” he said into her ear. “Nesta, open your hand and come back.” Her breathing sharpened. The cold deepened. “Nesta,” he snarled— And the cold halted. It didn’t vanish, but rather … stopped. Nesta’s eyes flicked open. Silver fire burned within. Nothing Fae looked out through them. Rhys shoved Feyre behind him. She shoved her way back to his side. But Nesta’s hand continued to squeeze Cassian’s. He squeezed back, let his Siphons send a bite of power into her skin. She turned her head so slowly it was like watching a puppet move. Her eyes met his. Death watched him. - ACOSF, chapter 31

I think a similar situation - though more high stakes/urgent - could come to play in Elain's book.

Elain is a Seer with mystical powers that are potentially tied to the Void.

She may try to See through mist and shadow, and accidentally make herself known to Koschei or another death god/Daglan?

In ACOSF, Nesta warned her to “stay away from the Cauldron,” and even Azriel suggested there was a darkness to the Dread Trove that “Elain should not be exposed to.” This, of course, makes many of us think that Elain will go after the Cauldron in her own book.

Could Elain mistakenly Look too far and open herself up to the Cauldron's living bond? That being said, it could simultaneously be using at least Jurian and Amren as well, and we have no idea if Made Fae who haven't been inside the Cauldron, such as Feyre and Miryam, are equally susceptible.

Part 2 - Not Made, yet possibly susceptible

I have been wondering for a while if the Cauldron can somehow form bonds, or weave threads, between itself and anyone exposed to it - or a part of it, when it was separated and hidden in different locations - for extended periods of time, or perhaps crucial ages, like somebody's formative years?

His mouth tightened, and he swallowed once before he said, “Hybern was looking for the Cauldron back then—for the pieces of its feet. One was hidden at the temple in Sangravah, its power used to fuel its priestesses’ gifts for millennia. - ACOSF, chapter 14

What if Gwyn - or anyone else - who grew up in Sangravah, a temple that housed one leg of the Cauldron, internalised some of the magic (sort of along the lines of River Song having regenerative abilities because Amy Pond fell/was pregnant while travelling on the TARDIS, and everything that happened after she was born - being taken away)?

All the High Priestesses wore the billowing, artfully twisted and layered robes—though they certainly were far from matronly. Ianthe’s slim waist was on display with a fine belt of sky-blue, limpid stones, each perfectly oval and held in shining silver. And atop her hood sat a matching circlet—a delicate band of silver, with a large stone at its center. A panel of cloth had been folded up beneath the circlet, a built-in swath meant to be pulled over the brow and eyes when she needed to pray, beseech the Cauldron and Mother, or just think. Ianthe had shown me once what the panel looked like when down: only her nose and full, sensuous mouth visible. The Voice of the Cauldron. I’d found the image unsettling—that merely covering the upper part of her face had somehow turned the bright, cunning female into an effigy, into something Other. - ACOMAF, chapter 2

@wingedblooms has suggested that priestesses could be influenced in general because they worship the triple goddess/divine trio, which follows along with what Feyre hinted at when thinking about Ianthe, all the way back in ACOMAF; that they opened themselves up to the divine during their services (in a similar way to how I imagine Elain's Sight may function). That being said, it's hard to say whether the priestesses at Cesere, Sangravah and Itica are more susceptible than their colleagues from other temples due to their prolonged proximity to the Cauldron’s feet, but I suspect it might be the case.

Could they have a deeper connection, or a bond of sorts?

One that remains even when they aren't communing with the Mother or the Cauldron?

One that may be accessed by the Cauldron or its Maker, for such nefarious purposes as letting in enemies to a library sanctuary?

Gwyn is likely already a lightsinger - please see @silverlinedeyes and @merymoonbeam for some brilliant posts that cover the basics of the theory and then some here, here, here, here and here - but if not, or maybe in addition to that, what if she was "Made-adjacent," and so also able to be used as a "puppet" by the Cauldron/the being controlling it, and thus any threads it may share with others? If accurate, this would work for anyone who was born, grew up, and/or lived for a long time in Sangravah, Cesere or Itica. To clarify, I don't think that these priestesses could call to or search for the the Cauldron, as they are likely not true “kin” - as, say, the Archeron sisters are to other Made items - but I could always be wrong about that. Or is this what lightsingers truly are?

Alternatively, what if every Singer (shadowsinger*, lightsinger, or any other type) was capable of the silent song, or had Made/Starborn powers in a way, and/or could be used as a "puppet" by the Cauldron or its master/maker? It would explain how Azriel's shadows could be used by someone else, maybe Koschei, thanks to the hypothetical living bond between the Cauldron and Made beings? So Nesta, Azriel (whose shadows are potentially Made, if not himself), Elain, Feyre, Amren, Miryam, Jurian, Gwyn and a whole lot of priestesses besides...

Too crazy? Probably, but that's why theorising is fun!

TOG SPOILERS BELOW