How to Build a Yu-Gi-Oh! Deck

The deck construction rules

A Yu-Gi-Oh! deck is made of a Main Deck, an optional Extra Deck and an optional Side Deck. Each has its own size limit, and the copy limit is shared across all three. These are the rules for the TCG as of September 2026; check Konami's current rulebook if a limit matters for an event.

Most players build at or near 40 cards in the Main Deck, and Konami's rulebook recommends staying close to the minimum. Every card past 40 lowers the chance that a specific card is in your opening hand of 5, so a card has to do something the rest of the deck can't to earn the space.

You can play up to three copies of a card, counted by name across the Main, Extra and Side Decks together. Two copies in the Main Deck and one in the Side Deck is three. Different printings and rarities of the same card count as the same card, because the name is what matters.

Building a first deck

This process keeps a first deck from turning into a pile of cards you like one at a time. It is one good way to start, and experienced builders often work in a different order.

1. Pick a strategy first. Start with one archetype, one engine or one game plan, such as a deck built around a single group of cards that support each other. A deck of unrelated cards is hard to tune, because you can't tell which parts are failing.
2. Add the core. Put in the cards the strategy exists to play, usually at the full three copies for the ones you want to draw most. Check each card's page for its Forbidden & Limited status before you count on three.
3. Add the cards that find your core. A strategy needs enough cards that start it, such as cards that search a key monster from your Deck, and enough that keep it going after your opponent interrupts it. Add support written for your archetype before you add generic cards.
4. Add the Extra Deck. Choose Fusion, Synchro, Xyz and Link Monsters your Main Deck can summon, and leave slots open if you are not sure yet. An Extra Deck monster you can't summon is a dead slot.
5. Count your card types. Look at the split between monsters, Spells and Traps, and at the Levels and Attributes of your monsters. If most of the deck can only be summoned with help from a card you run one copy of, the deck will fail often.
6. Trim toward 40. Cut the cards you like least until you reach 40 or a number you can defend. Then play it and change what didn't work.
7. Build the Side Deck last. Side cards are answers to what you actually meet, so they make more sense after you have played the deck.

Building a Yu-Gi-Oh! deck in TurnZero HQ

The Yu-Gi-Oh! Deck Lab is the deck builder in TurnZero HQ. It works the same way as the Deck Lab for Pokémon and One Piece, and it is free on iPhone, Android and the web. TurnZero HQ doesn't play the game for you. It holds your list and measures it.

1. Start a new deck. Give it a name, choose a format, and either start empty or paste a decklist.
2. Add cards by searching the Yu-Gi-Oh! catalog. Each card goes to the Main Deck, or to the Extra Deck by default if it is a Fusion, Synchro, Xyz or Link Monster. You can move cards to the Side Deck.
3. Watch the header. It shows the deck's size, whether it is Legal or has N things to fix, and the chance of the opening hand you care about. Each part opens the screen that explains it.
4. Fix what it flags from the Worth fixing list, such as a Main Deck under 40 cards or a third copy of a card that is Limited.
5. Save. Your edits stay in a draft on your device until you save, and the numbers you see while editing are the numbers you get after saving.

There are three formats. Advanced uses the current TCG Forbidden & Limited List. Traditional reads a Forbidden card as Limited. Unlimited ignores the list, which is useful for casual kitchen-table decks where nobody wants to check it.

Importing, exporting and publishing

You don't have to enter a deck by hand. The Deck Lab reads a YDK file, a ydke:// link, or a list of lines such as "3 Card Name" by exact card name. Anything it can't match is shown as an unresolved line so you can fix it. Export is a YDK file, which most Yu-Gi-Oh! tools read.

When a deck is ready, publish it from the Deck Lab's menu. Anyone with the link can see it, and it is listed with other decks on Yu-Gi-Oh! decks. Yu-Gi-Oh! decks are kept apart from Magic decks and never show up on the same lists.

To see how much of a deck you already own, keep your cards in your Yu-Gi-Oh! collection. You can add them by hand, import a CSV or scan them in with your camera, and the Deck Lab's Collection reading uses what you have.

Frequently Asked Questions