For some reason, my mind instantly jumps to dragons, probably some flying through the sky in the distance for character and maybe one large dragon you can interact with (think the Mother plant, only a dragon) hidden on a secret lot in the world (or just in one of its neighborhoods / areas). I imagine you'd be able to befriend this dragon and maybe ask it to impart some manner of wisdom or riches upon your sim, with success depending on relationship strength and (like everything else) your sim's mood, with perhaps a pinch of random chance.
