from mog bonanza. one sure way to get this would be to get all 10 marbles with the last digits being 1.2.3.4.5.6.7.8.9.0 will ensure you get this with nothing left to chance
I guess someone's been messing with .dat files because ffxi wiki has a screenshot of it already in a mog house. I was hoping it would be a little larger and a bit bolder in color but oh well. I still plan to get it.