I'm trying to build a character who suffers a strange and inexplicable stigma that attracts misfortune to all the people around him. (In South America it's called "mufa"; in colloquial language, "moopha.") My idea was to make a cowardly kobold, more roguish than arcane but with maybe some levels as a sorcerer to make all potential builds apply.
In the Forgotten Realms, where I usually play, I was thinking of something like an unwilling Chosen of Beshaba, with both the good and bad aspects of that.
Luckstealer (RotW) has Curse of the Fatespurned and Curse of the Black Cloud which are similar to my idea, but I want it to affect friend and foe randomly, like a black cloud that's always present, and give the character a sort of "Mr. Magoo" kind of luck.
There is also Auspician (F&P), Fatespinner (CArc), and Fortune's friend (CScoundrel)… and even this Luck amateur build that I like.
Any ideas of how could I get closer to what I intend? How should I plan the 20 level progression? Which feats should I take — are luck feats useful? (Elements from Pathfinder are also usable for this build.)