Build your deck
Pick cards or let a playstyle build the deck. The builder plays a full match with it and shows the score, what to buy each round and the final board.
How the deck builder works
What it does
You pick 9 cards (3 cost 3, 3 cost 5 and 3 cost 8) or let a playstyle build the deck for you.
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The builder plays the whole match with that deck, round by round, against the strongest decks right now. At the end it shows the score, what to buy each round, when to merge and the board you should aim for.
What the score means
The score is the share of matches the deck wins against a set of strong decks.
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Only the win counts: a close win is worth the same as an easy one. For reference, a random deck wins about 33% (2.5 stars), a strong player's typical deck sits at 43% (4 stars) and only the top 10% go past 57% (5 stars).
Where the numbers come from
Each card plays by its official text, at the level you pick.
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ATK, HP and cost per level are the same ones on the card pages, checked in the game. When the text doesn't say how two cards interact, I work it out from the text and mark it as a deduction. Saw a different number in your match? Send a screenshot through the Contact page: checked fixes go live.
Getting more out of it
Mark the card that will carry the deck with ★: the simulation then hunts its copies up to 3★.
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If you already have a favorite card, use "Build around a card" to see the best decks with it. "Suggest a card" shows the same-cost swap that raises the score the most. Turn on "Allow Variants" only if you own the Variants, or the score describes a deck you can't play.
Limits
It's a simulation, not the game. The shop has luck, your Ranked opponent changes from match to match, and a just-released card may not have every effect in the simulator yet.
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Use the score to compare decks with each other and find your deck's weak spot, not as a promise of a win.