You take the oddest bits of the Old Testament, stir in various secondary material from all three Abrahamic religions, and throw in Creationist kookery, and you have one of the weirdest and wooliest sword-and-sorcery settings around
* Sophisticated, but scattered civilizations
* Wildernesses full of every cool prehistoric critter of every era
* Centuries-old patriarchs - drop by the right place, and you can meet the very first man
* Mysterious wandering deities. You can't tell them apart, you can only take them at their word when they say they're your old benefactor. However, while quite powerful, they're less than omniscient.
* The beautiful and awful servants of at least one of those deities
* Giants and other fabulous hybrids of humans and some of those servants
* Strange and wretched once-humans cursed by those deities, who've gained vast power that they often use against humanity