Kostris is, or was and will be, the earthly embodiment of the Creator. Kostris came to earth to elevate men above animals by giving them Souls and teaching them how to be human.
Kostris gave man his soul, known as the “Gift of Kostris” and taught him the skills needed to be human. Right and wrong, good vs. evil and things like, agriculture, fire, pottery, writing, etc. After giving man these gifts Kostris left him on his own to develop as best he could and to strive for perfection. Many, many thousands of years later Kostris returned to earth. Man had strayed far from the path he had been set upon and Kostris sought to start him afresh. But evil had taken a deep root and its forces betrayed Kostris and murdered his earthly manifestation. Before he died Kostris promised to return once more, just before the end, and collect all those, living and dead, who were true to his teachings and take them to paradise.

Today the followers of Kostris are known as the ‘Children of Kostris’ and they seek to live by the tenants taught by Him. Unfortunately there are volumes of Kostris teachings, quotes, parables, interpretations, comments, analysis, etc. Consequently dozens of sects now exist, each claiming the “True Path’ or ‘Revealed Teachings’ etc, etc, etc…
Of the various groups, three are the most influential.

The largest and oldest of the Kostris faiths. It commands the allegiance of at least 60% of the Solistan population. They are a powerful, multinational force owning vast holdings and fielding large bodies of troops when needed. The center of the Orthodox church is in Gennos. The Orthodox regard all the other Kostris sects, especially the Reform and Followers of Darrian, as evil Heretics.

The Reform church believes that the Orthodox have lost track of the Truth of Kostris and become obsessed with earthly goals of wealth and power. They are the second most numerous sect, commanding about thirty percent of the population. Less structured and hierarchical than the Orthodox, but still a major political power. There is no central authority, rather there are national leaders who ally with each other as needed. The Reform regard the Orthodox as misguided heretics and pity the Followers of Darrian as deluded heretics.

Followers of Darrian
Darrian was an Orthodox Priest who claimed to speak with Kostris on an almost daily basis. His ability to perform astonishing miracles seemed to lend credence to his claims. Though he has since ascended (died) he has about 10% of the population as devoted and vocal followers. Darrian claimed that both Orthodox and Reformed churches have strayed and that only he could guide them down the right road. He said that the end was near, Kostris would return soon and those who followed the false faiths were doomed. No major holdings or centers of power, rather charismatic and inspired local leaders. They hate both Orthodox and reform churches.