HEART OFthe Cards
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HEART OFthe Cards
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Pick your box, tap the cards you pulled, and get your strongest 40-card deck plus a turn-by-turn plan against all four boxes. Built from every Delta Reign card's text. Free.
PBL Swiss rounds are best-of-1: consistency and your opening matter more than ever. Delta Reign becomes legal on 20 Nov, in time for PBL. See the new cards
Everyone at a Build & Battle plays one of these four. Here's how each one wins.
Masquerain
Keep your Bugs in the deck: Bug Out hits harder every turn.
Magmortar
Buddy Boost loads Electivire, then Voltaic Hammer KOs anything.
Enamorus
All four Incarnates in play, then 1-Energy hits for 70 to 110.
Kommo-o
Rare Candy into Kommo-o, then 170 damage every turn.
Read how it plays: first turns, key cards, best plays.
Every Delta Reign card as a picture. A tap per copy.
What to cut and add, and your winning line against every box.
The cuts and adds for your exact pulls, then the plan for every matchup: what they're trying to do, which Pokémon to Knock Out first, and your turns with the damage worked out.
H-mark cards are expected to leave Standard in April 2027. See exactly which cards each of your decks loses, and which popular decks get hit hardest. Reprints are checked, so cards that stay legal aren't flagged.
Browse any set as pictures, filter by type or rarity, and tap a card for its full text, including sets that aren't out in English yet.
Browse the sets →
Every popular deck ranked by expected win rate against the opponents you'll face, from real tournament results, with your own lists in the same ranking.
Rank my decks →
A test bench, not a place to play: our engine plays your exact 60 hundreds of times and tells you how often you get stuck, which cards sit dead, and the one swap that wins more.
Test my list →
Paste a TCG Live battle log or log a paper game: every turn rated, the better play where it mattered, and a verdict on what really decided it.
Review a game →
Prerelease prep, card lists and rotation are free. Pro is for when a big event gets close.
Testing one matchup properly takes an evening of play. The test bench gives you 200 games in 30 seconds.
A TCG coach costs US$30–60 an hour. Pro reviews every game you play.
One extra win in Swiss is often the difference between going home and making the cut.
The cards came out in Japan first. Card text is translated from the Japanese release and checked against English previews, and each deck's tricky rules are hand-checked. Wording on your printed cards may differ slightly; the numbers won't.
No. Picking your box, ticking your pulls and building your 40 are free for everyone, as often as you like.
Cards with the H regulation mark are expected to leave Standard in April 2027, going by every recent rotation. It hasn't been announced yet; the rotation page switches to official as soon as it is.
No. Heart of the Cards is an independent fan-made tool, not affiliated with The Pokémon Company, Nintendo or Limitless.
No. Play on TCG Live or with paper cards as usual. Heart of the Cards is where you prepare.
Yes. Your decks, pulls, games and reviews are visible only to you, unless you share something. See the privacy policy.
Everything starts from data: real tournament results, the full card text, rules we've checked by hand and hundreds of simulated games. Guides, builds and reviews are then written up from that evidence with AI assistance. Every card is checked against the current Standard format, so you won't be told to play a rotated card. They're strong guidance, not gospel, and each page says how confident it is.
Your best 40 and how to beat every box, in the next 2 minutes. Free.
Prep my prerelease, free