Shop › The World's Strongest Warriors Booster Box (OP-17) Image 1 of 2 Image 2 of 2 The World's Strongest Warriors Booster Box (OP-17) £119.76 sold out Each booster pack contains 12 cards.Release date: August 28th, 2026. Sold Out Added! Each booster pack contains 12 cards.Release date: August 28th, 2026.