What exactly were the Preceptors and what did they know?
Here is the item description of the Preceptor's Big Hat:
>Large hat with the movements of the stars drawn on the inside of the brim. Worn by the magic preceptors who served the Carian royals.
>Glintstone sorcerers are the descendants of astrologers, a fact that the Carians remain aware of. Even if their fate has been long severed from the stars.
So it seems like the Preceptors were maybe the resident mages of Caria, besides the royals themselves. A "preceptor" is someone who basically upholds a law or commandment, and in some contexts is a sort of instructor or overseer. Already, it's kind of hard to imagine what their actual role was besides "magic teacher", but it seems significant that they knew about the stars and fate.
What seems more juicy to me though, is the vow they supposedly took when Radagon married Rennala. Per the Mask of Confidence:
>When Radagon married Rennala, he ordered the Carian magic preceptors to don these masks. To make it clear that all of their matters were to be kept strictly private.
For posterity, "confidence" in this context almost certainly means "secret". As in, "can I tell you something in confidence."
Anyways, most people think that this item description refers to the fact that Radagon is Marika. But what is it that the Preceptors actually do that would make them uniquely privy to this information? I suppose it's possible that they had the bespoke knowledge of the astrologers - how to carve out one's primal glintstone and put it into new flesh. Knowledge of the separation of flesh and soul could potentially allow them to 'pierce the veil' so-to-speak, and understand that there's something funky going on with Radagon's soul and flesh.
Then again, the way the item description refers to the Preceptors' "matters", could imply that these were new tasks they were charged with following the marriage.
Their vow of silence could also have nothing to do with the Radagon/Marika thing. Their outfits have imagery of twin snakes all over them, which is kind of maddening because what are we supposed to take from that? I've seen someone suggest that the Preceptors might have known about Messmer, who was possibly an illegitimate child of Radagon's. This is a little tenuous, but it still begs the same question as before - what exactly were the Preceptors doing that would make them privy to such secret knowledge.
Does anyone have any theories? For such a footnote in the overall lore, the Preceptors seem to be within a big puzzle that's frustratingly difficult to solve.