Fwiw, the Maelstrom system did exactly that. It's essentially a historical fiction role playing game, so high fantasy tropes and the like are meant to be discou

Fwiw, the Maelstrom system did exactly that. It's essentially a historical fiction role playing game, so high fantasy tropes and the like are meant to be discouraged. Magic-as-luck-manipulation allows just enough freedom to be entertaining, while maintaining the milieu of the game. It also makes for very creative magic, since you are essentially handing the magician player an opportunity to effect the plot directly, in however they so imagine (and the DM and the dice permit), rather than giving them a gun with so many bullets in it, ala D&D.