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
Search the catalog
Find a card by name and add it to your collection.Set quantities
Track how many you own, including foils. Your collection's total value updates as you go.
Building a deck
Create a deck
From My decks, name it and pick a format (Standard, Modern, Commander, and more).Add cards
Search and add cards to the main deck or sideboard, and adjust quantities inline.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.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.