Snapdragyn
Explorer
What about a system...
...that does not come with a setting, but includes some simple (medieval?) weaponry...
...that includes a metaphysical trait for each character, which could easily be considered a tie to the netherworld...
...includes no core races, but builds characters off of an average human base, and allows unlimited reskinning...
...includes a highly customizable magic system, and highly modifiable rules in case the magic rules don't fit -just-right-?
So, interested?
Why, yes - yes I am.
(Also checking out some of the other suggestions so far - thanks everyone!)