This article explains the basics of support deck building for Umamusume: Pretty Derby Career Mode. It explains what kind of Support Cards to include by type, its effects, and more.
Table of Contents
Deck Builds by Character
Check the Umamusume's Growth Rate

Trainee Umamusume has a Growth Rate set, and the basic stats that are easy to improve are determined for each Umamusume. Therefore, it is very important to build a support deck that matches the Umamusume you are training to advance in your Career progress.
Example: Speed Growth Rate is High

When training an Umamusume with a high Speed Growth Rate, it is recommended to have about 2-3 Speed type cards to avoid increasing Speed more than necessary during Speed training.
![]() | Advanced players who can include multiple powerful Support Cards can aim for 1600 with two Speed Support cards if the Umamusume has a Growth Rate in Speed. |
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Use Skill-Compatible Cards

Skills may have conditions set, such as 'Front Runner Straightaways', as shown in the image. Support Cards with such Skills are highly compatible with Umamusume who have a high Aptitude for Front Runner.
Be Cautious When Farming Sparks
Spark farming, which is important for training Umamusume, involves including Support Cards with powerful hints to aim for specific Skills to turn into Sparks.
![]() | In Spark farming, it's often better to prioritize Support Cards with multiple powerful hints for specific Tracks or strategies over those with general-purpose hints. |
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Example: In the Case of SSR Silence Suzuka

SSR Silence Suzuka has a large number of Skills related to "Front Runner". Therefore, she is very powerful for training Umamusume with high Front Runner Aptitude or for Front Runner Spark farming.
Group Cards Trigger Friendship Training
Both Have Excellent Events

Friend/Group type Support Cards allow you to gain various effects from Recreation, such as Mood boosts, Energy recovery, plus stats, Skills, and more.
![]() | The Recreation from Friend/Group types is extremely powerful compared to the normal Rest/Recreation commands so you can spend your turns without waste. |
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Group Cards Support Friendship Training

Group type Support Cards, only when a Friendship Gauge is active, will trigger Friendship Training in any training session, unlike Friend types, so raising bonds is especially important.
Choose According to the Scenario

Some Friend/Group Support Cards can boost dedicated points or stats prepared for each scenario, so it becomes easier to progress through them.
![]() | Scenario-specific Friend/Group Support Cards are usually ineffective outside their intended scenarios, so they're best used in matching ones. |
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Multiple Inclusions Are Hard to Handle
A key advantage of Friend and Group cards is their ability to recover Energy without using Rest. However, including too many is not recommended, as excessive recovery can hinder event progress.
Support Card Deck Build Example
Example Composition for Sprint/Mile
Speed Slot | Speed Slot | Power Slot |
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Power Slot | Free Slot | Friend Slot |
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A basic Speed/Power composition example. For the free slot, it's recommended to include a Friend/Group Support Card that is a Scenario Link target for the scenario you want to train in. For Sparks, it's recommended to inherit 3-6 stars of Stamina and the rest in Power.
Mid/Long Distance Composition
Speed Slot | Speed Slot | Stamina Slot |
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Stamina Slot | Free Slot | Friend Slot |
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A basic Speed/Stamina composition example. For the free slot, it's recommended to include a Friend/Group Support Card that is a match target for the scenario you want to train in. Distribute Sparks to Power and focus on Speed or Stamina training.
Example Composition for Guts Career
Speed Slot | Guts Slot | Guts Slot |
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Guts Slot | Free Slot | Friend Slot |
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An example composition for a Guts Career to raise Guts and increase points. Since you will be focusing on raising Speed/Power/Guts, Sparks of these three types are recommended. Once you have a good set of Support Cards, you can reduce the Guts slots and add Wit to raise stats other than Stamina close to their limits.