Your Fortune's Tower ranking will only serve to unlock the tournament. You do not get any unique prizes unless you play the tournaments. Go into the Tournament menu, go to the third one over for Fortune's Tower. You'll need to make it to the final table, and then I think get in the top 3, but I'm not sure how high you have to place. Anyway, three star tournament, final table, and then hope for the best. Once you unlock it, it will pop up telling you so. Then you go to a travelling game master in your Fable II world and "merge with patron" to get your item(s).