Can you name some, preferably based in Cyrodiil or have potential to cross over into Cyrodiil, and a short description would be appreciated if it isn't obvious.

It would also help if they are shrouded and obscure.

Thanks.

Talos cult?

Ain't did much reading into it, but that's a candidate, I think.

Hmm, perhaps... all I can find on them is that they revere Talos Tiber Septim, and believe that Uriel Septim was weak. I can potentially use them... Thanks

Are there any others?

Cult of the Emperor Zero (Cuhlecain)

Followers of Shezzar, the Missing Divine

Various cults to Morihaus

Ancestor Moth

Oh, hello paw-prints, long time no see! And thanks, I'll look them up.
And you may be receiving a PM from me soon, depending on if I decide to start this project or not.

It was a timely question, as I just made up around fifteen Cyro-Nordic cults for a census taken by the Blades. Most fun I'll ever have with Monkey Truth!

Mythic Dawn would count, right?

Psh those guys are losers.

Mythic Dawn are largely defunct now, of course.

So what are you doing with all of this infomation?

I'm collecting it for a possible mod project in the future.

Cool, well i'm an Xbox 360 user so i'll never know them but i'll see what I can dig up.

The missionary arm of the great faiths, the Imperial Cult brings divine inspiration and consolation to the Empire's remote provinces. The cults combine the worship of the Nine Divines: the Aedra Akatosh, Dibella, Arkay, Zenithar, Mara, Stendarr, Kynareth, and Julianos, and the Talos Cult, veneration of the the divine god-hero Tiber Septim, founder and patron of the Empire. Imperial Cult priests provide worship and services for all these gods at the Imperial Cult shrines in settlements throughout Vvardenfell." MW Prophecies

The Imperial Cult's shrines are mainly found in Imperial Forts; the Imperial Chapels in Ebonheart serve as its headquarter on Vvardenfell. The Cult maintains relatively good relations with the other guilds of Morrowind, being allies with the Imperial Legion, Blades, and Fighters Guild and on friendly terms with the Mages Guild, House Hlaalu, and Redoran.

Is that any good?