The total card count from one tin is 50 cards. Each tin will come with 5 Prismatic Secret Rare variant cards(there are 14 different variant cards in total) plus 3 Mega Packs. Each Mega Pack contains 16 cards, 1 rare, 1 super rare, 1 ultra rare and 1 prismatic secret rare.
Each 16-card Mega-Pack has 12 Commons,1 Rare, 1 Super Rare, 1 Ultra Rare, and 1 Prismatic Secret Rare. There are three Mega-Packs per tin plus a 5-card Prismatic foil pack which makes 53 cards in each Mega-Tin.