How many cards should my deck have? I'd say **40**. Yeah 41 or 42 won't hurt a lot, but still the probability of drawing a starter already decreases with that number. Many Mathematically Yugioh How many starter cards should you run in a modern deck? Warning: Very In Depth. : r masterduel How many cards can you have in a Yu Gi Oh Master Duel deck? Rock Paper Shotgun Find out which Yu gi oh deck builder are you? ProProfs Quiz How to build a Yugioh deck Original 2001 Yu Gi Oh! Structure Decks Set to Return as New Special Edition Duel Sets