Spin a Duel Monster Rarity & Mutations Tier List
Pack rarity expectations and which cards deserve mutation attempts.
Understanding rarity and mutation chase value prevents wasted currency in Spin a Duel Monster. SDM Studio’s uses a familiar gacha pyramid—commons flood early packs, rares stabilize stands, epics anchor mid-game, legendaries chase long-term—but exact pull percentages are not public as of August 2026. This page separates general rarity expectations from mutation priority tiers used by the community when spending mutation currency from Mutations Guide.
Rarity pyramid (qualitative)
| Rarity band | Typical role | Stand impact | Mutation priority |
|---|---|---|---|
| Common | Fodder / first stands | Low | Skip |
| Rare | Early stand fill | Medium | Low unless event buff |
| Epic | Mid-game backbone | High | Medium–High |
| Legendary | Chase income & duels | Very high | High |
| Event / promo | Limited windows | Varies | Case-by-case |
Numbers like “2% legendary” appear on clickbait sites—we do not repeat them without official confirmation.
Mutation tier key
Mutations modify existing cards. This list ranks which bases justify attempts, not mutation success odds.
Mutation S-tier bases — Legendaries and top epics already placed on upgraded stands from Earn Money from Stands. Mutating here maximizes multiplier ROI tracked on Income Calculator.
Mutation A-tier bases — Strong epics you will keep post-patch according to Income Tier List and Battle Tier List.
Mutation B-tier bases — Duplicates of A-tier cards—experiment safely.
Mutation C-tier bases — Commons, temporary rares, or cards slated for replacement—burn budget here only during boosted events in Patch Notes.
Shiny variants layer
Three shiny concepts confuse players:
- Social shiny — Free Dark Magician from Shiny Dark Magician Guide
- Natural shiny pulls — Rare pack outcomes if banner includes them
- Mutation shinies — Rolled via mutation system
They stack differently per patch. Read latest Patch Notes before assuming double shiny equals double income.
Event mutation banners
Weekend events may boost specific attributes (fire, void, etc.). Updates Hub tracks dates. Save currency until official group posts confirm boosts—avoid unverified Discord leaks; find community links via Official Links.
Pack planning interaction
Use Pack Planner to budget pulls toward epic/legendary bases before mutation spending. Pulling a legendary you cannot afford to mutate yet is still fine—bank it on stands first.
Grading order reminder
See Card Grading for grade-vs-mutate sequencing. Wrong order can waste fees if patches reset visuals on re-grade.
Collection completion angle
Collection Checklist marks variant slots separately from base rarities. Completionists chase mutation S-tier for showcase, not always income.
Patch disclaimer
New banners insert unknown rarities. When SDM Studio’s adds cards, they start unranked until community sample sizes grow. We bump tiers in Tier List Hub notes instead of guessing day-one S-tier.
Extra planning notes
Mutation Luck and weather events change how fast you climb this list—see Mutations Guide and optional Robux notes in Game Passes. Keep Deck Building separate: a high mutation chase card can still be a poor duel pick. Track attempts on the Collection Checklist.
Related
Communicating uncertainty to friends
When friends ask “what are the legendary odds,” point them to this page instead of repeating forum guesses. Explain that rarity bands describe role—not percentage—and that mutation tiers rank which card to mutate, not how often mutation succeeds. Honest expectations prevent tilt spending and keep group trades fair when dupes are limited. After major patches, host a quick stand income test together using Income Calculator outputs before anyone commits mutation currency to a downgraded epic.
Frequently Asked Questions
Quick answers for duelists hunting cards, cash, and codes.
What are the exact legendary drop rates?
Unknown publicly. This list describes roles, not percentages.
Should I mutate commons for practice?
Only during confirmed boost events with spare currency. Otherwise skip.
Is shiny Dark Magician a mutation tier chase?
It is a separate social reward, though it may interact with mutation systems later.
Which rarity is best for mutations?
Legendaries and top epics you plan to keep on upgraded stands.
How do I track mutation variants?
Use the collection checklist tool and Patch Notes for new variant names.