Marvel Ultra Onslaught Trading Card Hobby Box 36 packs per box Basic set consists of 99 cards plus 1 checklist card Inserts include: OverPower Onslaught Hero Cards (approx 4 per box), PowerBlast OverPower Onslaught Mission Cards (approx 4 per box), Mirage cards (on average, 1 per box), and each box is supposed to contain 1 Ultra X-Men: Wolverine Preview card.