Which EDH Deck Can I Build Tonight?
When an EDH player wants to try a new commander using cards they already own, this tool fills gaps with functional substitutes and produces a complete 100-card deck they can play tonight.
EDH is a Magic: The Gathering format where players build 100-card decks around a single commander. When players want to start a new deck from their own collection, they usually begin with a popular list, then realize they are missing dozens of expensive singles. The real question is not, “How far am I from the original list?” It is whether the cards they already own can form a deck they can play tonight.
Players import their collection from a collection-management site and select a commander or theme they want to try. The product breaks cards into functions: early mana acceleration, card draw, answers to opposing threats, and ways to close out a game. It finds cards in the collection that can stand in for popular singles, then explains the trade-off of each replacement, such as being slower or answering only certain target types.
Rather than ranking results by the lowest price, the results page groups them into “build now,” “upgrade with a few key cards,” and “the core idea is there, but the build needs a different direction.” Opening any option reveals the complete 100-card list, missing-card priorities, and the role each owned card plays in the deck. Once a player chooses an option, they can export it to a familiar decklist site or create a playtest list with placeholder cards.
The first release supports common commander themes and single-collection imports, solving the immediate problem of one player starting one new deck. Price tracking, purchasing assistance, and complex power-level ratings can come later; on day one, it should help a player pull a playable deck from a box of loose cards.
Why now
A post on r/EDH dated August 17, 2026 asked whether a personal collection could be compared against EDHRec and Moxfield decklists to find deck shells that could be completed. S1 As of August 18, 2026, the post had a score of 1 and 2 comments; no existing tool was offered in the comments, so the gap remains turning collection overlap into a playable 100-card list. S1
Target user
Paper Magic players with a large accumulation of loose cards who do not know what commander deck to build next. The moment may be a game night, a freshly organized collection, or opening a commander they want to try. They do not want to copy a popular list first and then buy dozens of missing cards. They need to see which complete strategies their collection already supports and what a small number of additions would change.
Minimal entry point
Start with ManaBox CSVs, Moxfield exports, and plain-text card lists, normalizing them into card name, printing, and quantity. Use Scryfall bulk data for name resolution, legality, color identity, and rules text rather than making card-by-card requests. S4 Initially cover only common commanders and themes that have been manually reviewed. Tag ramp, card draw, removal, protection, and finishers using rules text, card types, and mana curves. Matching must first satisfy color identity, singleton requirements, and functional quotas, then generate candidates by collection coverage. The first version should not attempt fine-grained power assessments; it should explain replacement trade-offs and output legal 100-card lists.
Punching above its weight
The first users are already asking collection-matching questions in r/EDH discussions; respond with an anonymized example of a deck they can build. S1 Keep publishing before-and-after comparisons showing what can be built from a box of loose cards, with importable lists attached. Build shareable pages around individual commanders so decklists can naturally enter relevant community discussions. Preserve collection gaps and replacement reasoning on results pages, making them easy to share with friends for review.
Competitors & gaps
- BulkBrewGoogle
- BulkBrew already imports ManaBox CSVs, Moxfield exports, and plain-text card lists. It can build a complete deck from a collection around a chosen commander, or work in reverse to find the commanders best suited to that collection. Its generation process checks functional roles such as ramp, card draw, removal, and board wipes, and clearly flags missing cards. S2 That makes collection-based auto-building hard to differentiate on its own. The opening is in comparison and explanation: show several realistic options at once, grouped into decks that are ready now, decks that need a few additions, and decks that require a different direction. Each functional substitution should also explain what is lost in speed, target coverage, or consistency. Public documentation does not show this kind of card-by-card trade-off interface. S2
- MTG DeckbuilderGoogle
- MTG Deckbuilder already reads ManaBox collection exports and generates legal candidates within collection and format constraints. Users can lock in a commander or let the system find a suitable archetype. Results include a full decklist, structural scores, total cost, and archetype tags, with export to a generic text decklist. S3 It already covers the core job of showing what a player can build from the cards they own, so a new product cannot compete on decklist overlap alone. Its documentation says collection import currently supports only ManaBox; other tracker formats are not yet supported. S3 The opportunity is low-friction import from common sources such as Moxfield, along with EDH-specific explanations of functional substitutions. Players should understand why a card from their collection was selected, not just see an aggregate score.
How it makes money
Freemium subscription. The free tier supports one collection import and a limited number of deck candidates. Subscribers can save multiple collections, generate plans repeatedly, and see full replacement rationales and upgrade paths.
The case against
If functional-role classification is wrong, the system may produce a decklist with the right card count that cannot actually function. EDH cards often serve multiple purposes, and similar rules text does not necessarily mean the same role in play. Collection records may also omit cards, duplicate them, or include unusable printings, and those errors carry through to recommendations. Explaining the cost of every substitution requires maintaining theme rules and exceptions, while content costs will keep growing with new cards. If an initial list is visibly short on lands, card draw, or finishers, players will have little reason to trust another recommendation. Before proceeding, manually blind-test a small set of commanders and let users quickly correct role tags.