The Heretic Corvius bore a silken banner into battle, a blood-red standard embroidered with the ominous figure of a serpent.
Calvinus was one of the finest sculpters known to history. While he performed many an exceptional pieces of historical figures, he is best known for his “inspired” pieces - pieces he created out of his own memory. He said he would go into his studio alone, then just “bang out” a piece without break. This process explains his prodigeous output. There are several dozen exceptionally lifelike women (and a few men). Most are beautiful and scantily clothed, but his “Old Washer Woman” is a master piece. Many countries consider Statues by Calvinus to be national treasures.
The religion believes in reincarnation, but that you will be reborn in the past. People of today are those re-born of tomorrow, with some discarded as trash. The most pure will be eventually reborn in the mythical paradise-like past, where people lived for hundreds, or maybe even thousands of years.
This goes nicely with beliefs into foresight (you know a little about the future because you have been there), but also to many complaints of how things are going always from bad to worse.