24 packs 9 cards per packFall's 100-card booster set, Soul Fusion, returns to the roots of Yu-Gi-Oh! with new Fusion Summoning strategies! Deck themes from the earliest years of Dueling get a new lease on life, and there are more new cards to bolster strategies from recent releases as well. Here's some of what you can find in Soul Fusion!Twin-Headed Thunder Dragon was one of Dueling's first Fusion Monsters.