A Riftbound deck builder that enforces the rules while you tap
A legal Constructed deck is your Chosen Champion plus a 39-card main deck, exactly 12 runes, 3 different battlefields and 1 Legend, with at most 3 copies of a name and at most 3 Signature printings in total. The builder counts all of it live and hides the plus button before a limit can break.
The champion sits outside the list
Crowning a card moves one copy out of the main deck into its own slot; un-crowning puts it back. The slot and the list can never disagree, which is how every deck site models the format. The full rules are spelled out in the deck rules guide.
Built around what you actually own
Cards your collection is missing are dimmed on the deck page with an owned/needed count on the tile, battlefields included. One tap sends exactly the missing copies to a prefilled TCGplayer cart. A hand simulator and draw odds are built in for testing.
Decks travel as text
Paste any “3x Card (OGN-014)” style list to import a deck, and export yours in the same format. It round-trips with the deck sites and apps the community already uses.
The label stays yours
Mejai’s can propose an archetype from your curve and card mix, but nothing changes the label on a deck except your own tap.
