Raishan

Raishan - the Diseased Deceiver herself, Destroyer of EnThanUs, blight upon the land.

To date, the Tribe has not encountered Raishan herself at all, but her poison upon the people, upon the land, has been hard to ignore. From her cult of the Deceiver working to bring about the Downfall of EnThanUs, to the cult the Tribe encountered in the Frostweld with the image of Raishan herself that downed half of the party, to her special book that opens if Entropy bleeds on it....

She is a recurring nightmare on the land.

She is definitely not at all even more tightly wound in with the Tribe, not at all.