Being a Christian, the standard fantasy role-playing cosmology of dozens of gods, demigods, and whatnot has never resonated with me. So, this campaign will make use of a custom cosmology that I came up with a number of years ago. All player character clerics must choose one of these as the deity he serves. In addition, other character classes may choose to worship one of these deities as well. They may also choose to not. In the game world, there is ample evidence of the deities' existence and power, so there are no atheists. There are definitely people that don't care about the gods, though, just like in real life.

Sator is the creator of the universe and the many planes of existence. Sator, as the creator of all things, is revered by many people as the highest of all beings in the universe. Sator is depicted in many ways, though most often as an old man with a lighting bolt in one hand and a large hammer in another. Some people say that Sator pays special attention to life on the planet, as people are his highest creation. Others say that Sator's true love is the act of creation itself, as witnessed by the large number of planes of existence found by mages and powerful clerics in their studies. It is universally accepted that Sator created the demi-gods as his primary servants to oversee the worlds he has created.

Elatus is the demi-god worshipped by over 90% of elves. Elatus is depicted as a tall, beautiful female in floor-length robes of green and long, white-gold hair almost as long. Elatus' sphere of influence is the living world of plants, animals, and insects. While she has some human and halfling worshipers, the vast majority of her followers are elves.

Pumilio is the demi-god worshipped by over 90% of dwarves. Pumilio's sphere of influence is the earth and the rock, the base material of the world. Pumilio is generally depicted as a dwarf as wide as he is tall, holding a mountain on his back. Pumilio is worshipped by some halflings, but almost never by humans or elves.

Bongo is a minor deity for the dwarves, and he is only worshipped by dwarven clans to the east. Bongo's sphere of influence is luck, and tricksters and daredevils tend to call on his aid when things get dicey. Like when adventurers unexpectedly run into a group of goblins while exploring an underground cavern.

Dimidium is the demi-god of the halflings. Halfling stories show Dimidium as a good-natured prankster who constantly gets the better of his brothers and sisters in the celestial heavens. He is generally depicted as a tall halfling dressed in fine clothes, and always with a wine goblet in his left hand. It is rare for anyone other than a halfling to worship Dimidium, but the halflings have stories of human thieves who were turned from their criminal ways by a visitation from Dimidium, and who became his most fervent followers.

Aequitas is the demi-god of law and justice. He is most frequently worshipped by humans, along with some dwarves. Aequitas is depicted as the divine judge, holding the scales of justice in one hand and a shepherd's crook in the other. Even though he is a god of justice, he is not unkind. He is not, however, merciful, and usually his followers aren't, either.

Forsitis is the demi-god of luck and chance. He is generally seen as good friends with Dimidium, and there are a number of halflings that follow him, along with humans and a few elves. He is generally depicted as a human male who is completely average in every possible way, juggling a dozen gold coins.

Pondera is the demi-god of balance and harmony. Pondera is usually depicted as a pretty young woman, holding an olive branch in one hand and a dove in the other. Her generally peaceful nature draws some halflings and elves to follow her, as well as many humans, especially farmers and others who rely on balanced nature for their livelihood.

It should be noted that all of the deities above are considered good in nature, and all of the demigods are part of the same pantheon, where they have a subordinate status to Sator, the creator. There are evil deities, however, and they strive with Sator and his servants. The primary of these is Balor, the god of destruction. Where Sator seeks to create new things, Balor exists only to break and shatter those same things. Worship of Balor is outlawed in all civilized lands. Many of the evil humanoid tribes worship different demi-gods, as well.