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 Everything You Need to Know About Deckbuilding Rules in Yu Gi Oh Yu Gi Oh Guides Out of Games 60 Card Pile Deck Breakdown Guides, Decks & Tournament Usage Statistics Yu Gi Oh! Meta 6 Decks You Should Build For Yu Gi Oh Genesys TCGplayer