Field Centers were popularized by YGO, but are awesome to use for multiple card games, or just a collectable piece of art! As they are numbered, there's only a limited amount made. (250) - 100 will be in the Mozzuboxes. 

5￭ Metal Collectable card (Field Center) (LIMITED)
Price : $14.99
Size :  Standard Playing Card
Material : Metal with golden plating