Muster — a multiplayer deck-building card game you play in the browser
A deckbuilding game where you can create custom cards
“+$2, and each rival sheds their hand down to three.”
+$2. Each other player discards down to 3.
No account needed.
Build the deck while you play
Start with a small deck, buy better cards, draw them later, and build your strategy one turn at a time.
It's a card game where you build your own deck as you play. Buy cards, draw them later, and turn a weak starting deck into a machine.
Start with a small deck and buy stronger cards.
Add money, actions, attacks, defense, and points.
When the game ends, the player with the most points wins.
A two-minute interactive tutorial walks you through your first game.
Turn an idea into a playable card
Describe a card in plain English. Muster drafts it, tests it, gives it art, and gets it ready for real matches.
From idea to playable card.
Describe the card you want. Muster drafts the design, tests the rules, tunes the cost, paints the art, and prepares it for multiplayer games.
Rules Check
Turns your idea into card text the game engine can run.
Balance Check
Looks for loops, locks, and cards that are too strong or too weak.
Bot Tests
Runs trial games to see how the card behaves in play.
Cost Tuning
Checks cost, tempo, attacks, and payoff before the card ships.
Art Pass
Gives approved cards a name, art, and finished card face.
Cards the community made
Every one of these started as a sentence someone typed. Browse the full compendium of base and custom cards.
Play in the browser
Live multiplayer rooms, bots, desktop and mobile layouts, and cards you can actually read.


Choose a table
Every route points toward playing quickly: solo practice, friends, open tables, or ranked games.
Friends
Invite friends and try your custom cards in private games.
Public games
Join an open table and play against the community.
Bots
Practice against bots or test new cards before taking them online.
Ranked
Play competitive games and track your rating.
Playing costs nothing.
Creating a card costs one Blank.
Games, lobbies, bots, and community cards cost nothing. Blanks pay for card making, rules checks, art, testing, and upkeep.
Make a card. Play a match. See what breaks.
No account needed.