[quote=@Terminal]
It's possible but iffy with the Fulmen Nati. They are perfectly open to the existence of gods and pantheons other than their own, and they are also open to the worship of aforementioned gods and pantheons. . .Just so long as THEIRS come first.

Between the Hallucinogenic Incense, the rather well-educated Priesthood, and the fact that literally 100% of the population is Effulgent - it might be difficult to cram in a weirdo mini-pantheon with only one major god that doesn't carry any of the same perks worshiping the native religion does. I am open to suggestions though.
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[quote=@Cyclone]
If you read about the Mazdacs, they are utterly insane but in a weird way they actually are tolerant and quite good at coexisting with other religions. Similarly to the Fulmen Nati they have no problem woth other gods. I vaguely mentioned that the Mazdac even affirms the existencd of some other gods, so Ternion could be a part of it.

Maybe your religion could exist in a sort of limbo, partially incorporated by the Mazdac to varying degrees? Some places might reject the Ternion totally, some might see it as a cult, some as a minor pantheon, some as nearing the status of Selijuk, etc.
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[quote=@Sini]
<Snipped quote by OneEyedChurro>

The Vath worship a pantheon. Something I did deliberately since it allows for the incorporation of (foreign) deities. You can assume your god/goddess/gods are being worshipped in Vath albeit under a different shape or name.

[@ClocktowerEchos]
Hehe, piggy infantry.
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I should also say that the thing I'd be having Grand Triarchate do is set up a new Ziggurat. [@Cyclone], I could see him visiting your nation in person (With a supervising outfit of Oathguards), but [@Terminal] and [@Sini], yours could be fun, as well; perhaps trying to set up a Ziggurat would offend some, though, and require he do it in secret/cleverly? That could be interesting.