Ythana Moor has the title “Archierophant” (Sharn City of Towers)
As far as reading around Silver flame, That’s the only place I see that title. So what exactly does that mean? Where is she on the pecking order? This is an indication of the impact of the Last War. Short form (long is too long for a tweet) is that the Sharn Church of the Silver Flame established its own hierarchy to show that they were independent of Thrane… which is one reason that Ythana is THE WORST.

— Keith Baker (@HellcowKeith) February 25, 2021

I was unknowing of this split you mentioned. What books/articles would contain the long form of this split and more of Ythana’s Corruption. City of towers only mentions/alludes to these in brief. Currently, there are no further sources on it, which is why I was saying it would take more than a tweet to address in detail. It's a good IFAQ topic for my website — perhaps next month.

— Keith Baker (@HellcowKeith) February 26, 2021