About & Credits

The game

This site is built around Spin a Duel Monster, listed on Roblox as [RA] Spin a duel monsterby SDM Studio's.

Bundled safe fallback active

• Index roster

  138 cards / 1051 confirmed Index entries. Normal currently lists 138 cards; every mutation section is calculated from the same current runtime catalogue and each card's confirmed Index availability. Hacked is a valid ×7 mutation with no in-game Index section, so it is never counted toward Index completion.

  7 card + Index section pairs are still awaiting verification.Fixed Exclusives follow their confirmed per-card mutation policy; SDM Exclusives remain Normal-only.

• Card abilities

  21 confirmed ★ ability cards in the current public catalogue. A starred card grants its listed effect while placed on your plot. Community tested: abilities scale with mutations and grading, stack additively across the plot, then clamp to their confirmed caps. Income Aura is excluded from Money/s because its income effect is not observable in-game.

Spotted a change after a game update? Report it as “Live Index > [Section] roster” or “Card Wiki > [Card] > Card Ability”.

Credits

• Community Tool

  MostZaraki

  @mostzaraki

  Created & maintained this fan-made calculator, wiki and index tracker.

  Copy Discord handle

• Game Owner

  Ryan

  @ryannffc.

  Owner of Spin a Duel Monster, the Roblox game this community tool is built around.

  Copy Discord handleDiscord profile

Discord profile links require a numeric Discord user id. We do not invent them, so only handles are shown until an id is supplied.

Found wrong or missing data?

All values here are community-gathered. If something looks off, please report it — it gets fixed fast.

Accounts & privacy

• Connecting Discord is optional: the public tools — Calculator, Live Index, Card Wiki, SDM Exclusives and the guides — all work signed out. Your private collection requires signing in because it is stored privately on your account, and now lives in Trading Hub → My Collection.
• Live presence on the public tools is anonymous for everyone: no names, avatars or page locations are shown to other players. Trading Hub online status for verified members is a separate, opt-in setting.
• Hidden profiles remain identifiable to site administrators for moderation and account support.
• Live presence itself is ephemeral: it shares only a temporary random session id and a coarse area bucket, and nothing from it is kept once you leave. The separate admin-only visitor history below does store the coarse metadata described there.

Admin-only visitor history (v1.9.0)

• Site administrators can see a private visit history: when a visit started and was last active, the entry and last area (a coarse label such as Card Wiki or Calculator), a page-view and session count, and the identity type.
• We store no IP addresses, no browser or device fingerprints, no mouse or click tracking and no exact route-by-route history. Detailed visitor session rows are deleted after 30 days.
• Without a name or Discord you only get a short visit-session identity that rotates after 30 minutes of inactivity — you are not recognised across days or devices.
• Guest display names are retired and can no longer be created. Legacy guest aliases already stored in a browser may still appear in the admin-only visitor history until they are cleared from the Account page.
• Discord-connected visitors can be identified by site administrators in visitor history even when the public profile toggle is off; public presence privacy is unchanged.

Disclaimer

This is an unofficial fan-made community project. It is not affiliated with, endorsed by or sponsored by Konami or Roblox. All game data is gathered by players and may be incomplete or change with game updates.

Stable v1.17.0 · released 2026-09-14 ·View changelog