MTG Library & deck builder

Track your Magic: The Gathering collection and build decks with a mana curve, format legality, and decklist import/export.

Magic playersUpdated June 17, 2026

The MTG Library (in the Board Games Hall) tracks your Magic: The Gathering collection and helps you build decks from it.

Your collection

  1. Search the catalog

    Find a card by name and add it to your collection.
  2. Set quantities

    Track how many you own, including foils. Your collection's total value updates as you go.

Building a deck

  1. Create a deck

    From My decks, name it and pick a format (Standard, Modern, Commander, and more).
  2. Add cards

    Search and add cards to the main deck or sideboard, and adjust quantities inline.
  3. Check your build

    The builder shows a live mana curve, a format-legality check (deck size and copy limits), and which cards are missing from your collection.
  4. Import / export

    Paste a decklist to import it in one go, or copy your decklist out as plain text.

Share a deck

Decks are private by default. Set a deck to unlisted or public to share a read-only link with friends.

Note

The card catalog is shared and kept up to date from public card data, so prices and new sets stay current.

Still stuck? Browse all help or report a problem from the relevant profile or session.