Scales of War
Believes himself to be chosen by Ioun, the Goddess of Fate, as part of an intricate plan for the world.
Luther Coldeye has never won any game of chance in his life. Not a roll of the dice, not a hand of poker, not even when he cheats. He has also never come to serious harm, though he gets into mortal danger on a fairly regular basis.
He uses gambling as a way to tithe – pass money on to where Ioun decides it should go, while receiving an assurance that the gods are still watching out for him.