MTG Deckbuilder

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How scoring works
Grade
A through F. Quick read on overall deck quality, derived from the composite score below.
Composite
0–100 blend of synergy, curve fit, fill, castability and wincon coverage. This is the number we sort decks by.
Synergy %
Share of the deck's nonland cards that score ≥ 2 against the archetype's signals. Higher means more cards pull in the same direction.
Castability
Hypergeometric probability that each spell can be cast on-curve given your mana base.
01 / Collection & Format
Format
Loading formats...
CSV Collection (ManaBox export)
or drag & drop .csv here
✔ Collection uploaded — rows detected
02 / Preferences
Play Style
Color Preferences
Archetype Preferences
The builder will scan your collection and pick the strongest archetypes automatically.
Only building decks for selected archetypes.
Pre-Build Locks
Commander
Searches valid commanders for this format. The build still checks that your uploaded collection owns the selected card.
Searching...
Required Card
Searches any legal card for the format. For v1 this lock is nonland-only, and the build fails fast if your upload does not own the selected printing.
Searching...
Constrained builds automatically cap the number of generated decks so the builder spends its budget on fewer higher-quality results.
Advanced Parameters
Max Decks
Minimum Grade
(filters out weaker decks)
Language
Include Foils
Min Deck Price ($)
Max Deck Price ($)
Uses your CSV purchase prices as per-card values. Decks outside the selected range are excluded from results.
Card Condition (leave empty for all)
Waiting for format options to finish loading.
03 / Build Progress
☕ Ko-fi
synergy score pinned
synergy score