Free Deck Planner Updated September 7, 2026

Umamusume Deck Builder

Plan a six-card support deck, check its stat coverage, and find the biggest training gap before you commit a run to the game.

Support cards Deck building Training planning Build review

Build the deck around the race you actually want to run

A support-card deck has to match the distance, target stat, scenario, and flexibility you need during training. This Umamusume deck builder gives you a quick planning pass before you choose inheritance, skills, and races.

Enter each card's role and level, choose a distance and focus, then compare the result. The score is a transparent signal based on coverage, focus alignment, levels, and variety; it is not a hidden game formula or live card database.

See the shape

See repeated types, missing stats, and over-specialization across six slots.

Test a goal

Test sprint, mile, medium, or long distance with a focused or balanced plan.

Make one change

Test one replacement at a time, then validate the finished runner in the race simulator.

Build Your Six-Card Support Deck

Enter the cards you own or are considering. Each slot is a training role rather than a named card, so the builder works for a new account, scenario draft, or quick deck comparison. Use current levels for owned cards and conservative expected levels for future cards.

Distance changes how much flexibility you may want around Speed, Stamina, Power, Guts, and Wisdom.
Pick the stat you expect the deck to emphasize, or use balanced when the build needs broad coverage.
Support-card slots

Choose the main training type for each card and enter an expected level from 1 to 50. Friend or utility cards count toward variety but do not cover a core stat.

Levels are a comparison input. A high score does not mean a low-level card suddenly has the same value as a maxed card.
Planning tip: Compare decks with the same distance and focus. Usually the useful question is which single slot fixes the weakest part, not which deck has the biggest headline score.

Deck Planning Output

Example output
81 / 100
Stat coverage
80%
Focus match
88%
Average level
32.5
Planning read
Focused but flexible

This focused but flexible deck scores 81/100 for a medium-distance Speed goal. It covers several training needs while leaving one stat type outside the six-card plan.

  • Keep the Speed focus if the target runner needs a strong velocity ceiling.
  • If late-race stability matters, test a Guts card or compare the result with the stamina calculator.
  • Run the finished build through the race simulator before treating the deck score as a verdict.

Example deck

The example uses two Speed cards, Stamina, Power, Wisdom, and Friend or utility. It is a starting point, not a universal recommendation.

  • Medium distance with Speed as the main focus.
  • Average expected card level: about 33.
  • Four core stats covered; Guts is absent.
  • Use the race simulator after training to check the runner and course.

How to Use the Umamusume Deck Builder

Use the builder as a comparison loop: set the race, enter six realistic roles, and change one slot when the output shows a problem.

1. Set the race context

Choose sprint, mile, medium, or long distance. Distance changes how much stamina safety, acceleration, or flexibility you may want; check the event course separately.

2. Pick the main training goal

Select the stat you expect to emphasize, or choose balanced coverage. A focus is a testable assumption, not a command to stack one type.

3. Enter all six card roles

Choose Speed, Stamina, Power, Guts, Wisdom, or Friend and add a level. Use the current level for an owned card and a conservative level for a planned or borrowed card.

4. Review, replace, and verify

Read coverage, focus match, average level, and suggestions together. Replace one weak or repeated slot, review again, then validate the runner with the other tools.

What Each Support-Card Role Adds

Cards are grouped by their main training role so the result stays useful across card pools and scenarios. This table is a decision aid, not a permanent tier ranking.

Role What it can contribute What to watch
Speed Supports a high Speed target and focused race plans. Too many copies can leave Stamina, Wisdom, or another bottleneck uncovered.
Stamina Supports medium- and long-distance endurance planning. It may add little when the race is short or another source already covers stamina.
Power Supports acceleration and builds that cannot rely on Speed alone. It is not a universal fix for stamina or skill-activation problems.
Guts Adds a late-race or endurance role to a deliberate specialization. Add it for a scenario or course reason, not just for variety.
Wisdom Supports skill activation and a steadier training rhythm. It may improve consistency without fixing a missing Speed or Stamina target.
Friend / utility Fills a flexible scenario or utility role. If it solves no real constraint, test a core-stat replacement.

How to Read the Deck Builder Output

The output is split into signals instead of one ranking. A high-level deck can still miss a stat you need, so use the numbers to choose the next test.

Deck score

This combines level, coverage, focus match, and variety into a 0–100 planning score. Compare versions with the same context; it is not an official rating or race guarantee.

Stat coverage

Coverage shows how many of the five core stat roles appear. High coverage adds flexibility; low coverage can be correct for a deliberate narrow plan.

Focus match

Focus match checks whether the selected goal appears in the deck. A high value supports the plan but does not prove the course, card skills, or scenario are right.

Average level and planning read

Average level explains part of the score, while the planning read summarizes the shape. When two decks are close, test the weakest variable instead of chasing one point.

Example Deck Decisions

Different goals can justify different compositions. Use these examples as decision prompts, not a fixed best-deck list.

Focused Speed plan

A sprint or mile runner may start with multiple Speed slots and utility. If coverage is weak, check stamina before adding another Speed card.

Medium-distance balance

A medium plan often benefits from Speed, Stamina, Power, and Wisdom. If levels are low, a simpler reliable deck may beat broad but under-leveled coverage.

Long-distance safety check

For long races, test endurance before optimizing the headline stat. Pair the review with the stamina calculator and race simulator.

Limits, Validation, and Edge Cases

A support-card deck is only one layer of an Umamusume build. This tool intentionally stays transparent and lightweight so it can help with early choices without pretending to know every hidden interaction, scenario bonus, card skill, or future balance change.

  • The builder uses card roles and expected levels; it does not contain a live database of every support card, skill, event, or limit-break effect.
  • The score is a comparison heuristic. It cannot predict a win rate, a guaranteed rank, a friendship event, or a particular training outcome.
  • A tier-list result and a deck-builder result answer different questions. A high-tier card may still be the wrong slot for a specific distance, scenario, account, or skill plan.
  • If two cards share a type but have very different events or skills, enter the role first and inspect the named card's details separately.
  • When a build fails, identify whether the cause is stats, stamina, skills, aptitude, race schedule, or strategy. Change one factor at a time so the next simulator run teaches you something useful.

A practical verification loop

Draft the deck here, check the training schedule and race bonuses, review stamina for the target distance, and then run the finished stat line through the race simulator. If the runner performs poorly, return to the deck only after identifying the measured bottleneck.

Frequently Asked Questions About the Umamusume Deck Builder

It compares six support-card roles against a selected distance and training focus. The output includes a planning score, core-stat coverage, focus match, average expected level, a short read, and suggestions for the next change. It does not calculate an official in-game rating or simulate every card event.

Six slots are a practical planning boundary for comparing a normal support-card deck. The builder treats each slot as a role, which lets you draft around cards you own, borrowed cards, or a future deck without requiring a complete live card database.

No. A higher score only means the entered roles and levels look stronger under this transparent heuristic. The best deck still depends on the target runner, scenario, course, card skills, events, inheritance, and your ability to reach the intended levels consistently.

A tier list ranks or discusses cards. A deck builder checks whether the six roles you selected fit together for one training goal. Use the tier-list guide to shortlist cards, then use this builder to compare compositions before you train.

Enter the card's current level when you are reviewing an owned deck. For a planned deck, use a conservative expected level rather than the maximum you hope to reach. The number helps compare reliability and investment; it does not replace the card's actual event, skill, or limit-break value.

Check race bonuses and stamina for the target distance, train the runner, and use the race simulator to compare the finished stats, skills, placement spread, and final-spurt behavior. If the result is weak, change one measured bottleneck at a time instead of rebuilding the whole deck from the headline score.