I try to keep an updated list in my collection, and a few weeks ago I acquired the Guilds of Ravnica Simic Guild Kit, when I went to add those cards I saw that that particular set wasn't an option to select. I just assumed that it was in the process of being added, but today I checked and again the Dimir, Golgari, Izzet, Selesnya, and Boros guild kits are there but not Simic?