MTG Ultimate Masters Booster Box, Factory Sealed. The item "MTG Ultimate Masters Booster Box, Factory Sealed" is in sale since Monday, February 4, 2019. This item is in the category "Toys & Hobbies\Collectible Card Games\Magic\ The Gathering\MTG Sealed Booster Packs". The seller is "kiefer" and is located in Seattle, Washington. This item can be shipped to United States.