Deckmaster AI Agents
An AI deck builder for Standard, Pioneer, Modern and Commander that checks every card against Scryfall, plus the meta, the big events and our deck-building tips.
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Which AI do you want to use?
No key? Use ours Agents Plus: C$5 a month plus AI credits. Coming soon.
Your key stays in your browser. It is kept in this tab only (or on this device if you tick Remember) and sent only to the AI company you picked, straight from your browser. It never reaches pokemonpack.com, and we never see or store it. Your builds are billed to your own AI account; the shop pays nothing. A remembered key can be read by anyone using this browser: press Forget key when you're done on a shared computer.
An API key is like a password that lets an app use your own account with an AI company. You paste it here, and the deck builder uses your AI account to do its thinking. The AI company bills you for what you use, usually a few cents per deck.
Why we ask for one. The deck builder is free: we don't charge for it and we don't run the AI ourselves. Your key goes straight from your browser to the AI company you picked. We never see it, store it or take a cut.
A subscription is not an API key. ChatGPT Plus, Claude Pro, Gemini in the Google One plans and other app subscriptions don't include an API key or API credit. The API is a separate, pay-as-you-go account on the developer sites below (you can sign in with the same login).
sk-ant-).sk-; it's shown only once).Free tier: Google's Gemini API has a free tier: many models, including the Flash models, cost nothing within daily limits, with no card needed. On the free tier Google may use what you send to improve its products; on the paid tier it doesn't. The newest Pro models need billing turned on.
sk-or-).A build reads about 25,000 to 60,000 tokens and writes 4,000 to 9,000 (a token is about three-quarters of a word). With list prices on 8 Oct 2026:
| Model | Per deck, roughly |
|---|---|
| Claude Sonnet 5.5 (Anthropic, our default) | US$0.09 to US$0.21 |
| Claude Haiku 4.5 (Anthropic, cheaper) | US$0.04 to US$0.10 |
| GPT-6.1 Sol (OpenAI) | US$0.09 to US$0.21 |
| GPT-5.4 mini (OpenAI, cheaper) | US$0.04 to US$0.09 |
| Gemini 3.1 Pro Preview (Google) | US$0.10 to US$0.23 |
| Gemini 3.8 Flash (Google, paid tier, until 31 Dec 2026) | US$0.03 to US$0.08 |
| Gemini Flash models on Google's free tier | US$0 (within the daily limits) |
| OpenRouter | The model's own price: the builder shows the estimate when you pick one |
Asking for changes afterwards costs a little more each time. The page shows the real token count after every build. Price lists: Anthropic, OpenAI, Google, OpenRouter.
Tell it your format, play style, budget and the cards you own. It looks up every card in the card database while it works, builds a legal MTG Arena / MTGO text list, then explains the game plan, the key combos, how to mulligan, tech options, budget swaps and the non-obvious synergies most players miss. Before you see the list, this page checks the card counts and legality again and flags any problem.
It works with Claude (Anthropic), GPT (OpenAI), Gemini (Google), or hundreds of other models through OpenRouter. You bring the key; open What's an API key? above for a two-minute how-to.
One click fills in the form and a detailed request that gets the most out of Mox. You can edit all of it before you press Build.
Deck names are suggestions from 2026-10-08; the meta moves fast, so check MTGGoldfish metagame: Standard for this week's top decks.
Cards I own (optional: attach your TCGplayer, Collectr or other export, or just paste a few cards below, one per line)
Your collection stays in your browser. The file is read on your device and is never uploaded to pokemonpack.com or saved anywhere. When you press Build, only the card names and counts go to the AI you picked, and card names to the public card database. Reads Moxfield, Archidekt, ManaBox, Deckbox, Collectr and TCGplayer exports (CSV or Excel .xlsx), Arena / MTGO text, or plain lines like “4 Lightning Bolt”.
Example output · hand-written sample, not a live build
Game Magic · Format Modern · Style: aggro · Budget: mid
Deck 4 Goblin Guide 4 Monastery Swiftspear 4 Eidolon of the Great Revel 4 Lightning Bolt 4 Lava Spike 4 Rift Bolt 4 Skewer the Critics 4 Boros Charm 4 Lightning Helix 2 Searing Blaze 2 Skullcrack 4 Inspiring Vantage 4 Sacred Foundry 2 Arid Mesa 2 Bloodstained Mire 2 Wooded Foothills 6 Mountain Sideboard 3 Path to Exile 3 Kor Firewalker 2 Roiling Vortex 3 Smash to Smithereens 2 Deflecting Palm 2 Rest in Peace
Deal 20 damage before the opponent's deck comes online. Creatures chip in early, then every burn spell goes to the face unless a blocker must die.
Skewer the Critics costs one red mana after any creature hits; Eidolon punishes both players, but you win the race because your curve is lower.
Keep two-landers with a one-drop creature. Mulligan seven-card hands with no creature and no Rift Bolt.
Kor Firewalker and Path against other red decks; Smash and Rest in Peace against artifact and graveyard decks.
The six fetch lands are most of the cost: play Mountains in their place. You lose a little Lightning Helix and Boros Charm consistency, and the game plan stays the same.
This is a hand-written example to show the layout. It was not checked against the current ban list: run a real build to get a validated list.
Finds flyer deals, sales, restocks, MSRP finds and new releases for Magic near you or online. The AI you picked searches the web with its own search tool, and every find comes with its sources and the date we found it.
Searches run on your own key. Each hunt uses your AI account's web search and may cost you a few cents, billed to your own AI account. The shop pays nothing and never sees your key.
Leave it empty to look at online shops only. Your area is kept on this device and sent only to the AI you picked, with the search.
AI finds can be wrong or out of date: the AI reads public web pages and we don't check its answers. Call the store before you go.
Where the winning Magic lists live. We link to these sites rather than copying them. Links checked 2026-10-08.
In 60 cards: about 20 to 22 lands for a low-curve aggro deck, 23 to 25 for midrange, 25 to 27 for control or ramp. Cheap card draw and mana-value-1 cantrips let you shave one. Commander usually wants 36 to 38 lands plus about 10 ramp pieces.
Count your spells by mana value. Aggro decks want most spells at 1 and 2 mana and few above 3. Midrange peaks at 2 and 3. Control can go higher but needs early interaction so it lives to cast its top end.
A spell you want on turn one with a single coloured pip needs about 13 to 14 sources of that colour in 60 cards to cast on time most games; double pips early need much more. If the numbers don't work, cut a colour or move to a lower-pip version of the card.
Play 4 copies of the cards you want every game (your best threat, your best removal). 2 or 3 of cards you want once but not twice (legendary cards, expensive finishers). Ones are for tutors and silver bullets.
Plan your 15 by matchup before the event: for each likely opponent, write what comes in and what goes out, in equal numbers. Don't board in more than you take out of the same role, and remember you can be on the draw after a loss.
100 cards, one of each (basic lands aside), every card inside your commander's colour identity. A solid start: 10 ramp, 10 card draw, 8 to 10 single-target removal, 2 or 3 board wipes, then your theme. Synergy with your commander beats a pile of generic good cards.
The mana base is usually the most expensive part: start with basics and budget dual lands, and upgrade lands last because they carry across decks. Pick an archetype whose key cards are commons and uncommons, then upgrade the top end one card at a time.
Card data and images: Scryfall, read by your browser while you build (Scryfall doesn't endorse this page). Deckmaster AI Agents is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC. Meta and event links go to the sites that run them: we link to them, we don't copy them. AI answers can be wrong: check a list before an event.
This web app is 100% machine readable and completely AI friendly.
Pokémon and all related names are trademarks of Nintendo, Creatures Inc., GAME FREAK inc. and The Pokémon Company. Magic: The Gathering is a trademark of Wizards of the Coast. Yu-Gi-Oh! is a trademark of Konami. NOMAX Pokemon is an independent card shop, not affiliated with or endorsed by them.