yugioh cards that let you normal summon twice Double So... am I missing something,

Official Card Game Card Database (Ruling) (in Japanese)

15x packs per box

Not too shabby for a show where characters play card games the entire time

24%inclusion 23%synergy 2.87K decks 12K decks Sudden Strike 24%inclusion 23%synergy 2.83K decks 11.8K decks Tangle 21%inclusion 21%synergy 2.54K decks 12K decks Double Trouble 16%inclusion 16%synergy 1.97K decks 12K decks Wisecrack 16%inclusion 15%synergy 1.87K decks 11.9K decks Terrific Team-Up 15%inclusion 14%synergy 1.74K decks 11.9K decks Secret Identity 14%inclusion 14%synergy 1.69K decks 11.9K decks Terminate 12%inclusion 8%synergy 1.44K decks 12K decks Silkguard 11%inclusion 11%synergy 1.33K decks 12K decks School Daze 10%inclusion 10%synergy 1.22K decks 11.9K decks Whoosh

To compete in a WCQ or Dragon Duel WCQ, a Duelist must first earn an invitation at a Regional Qualifier, Dragon Duel, Yu-Gi-Oh