Mathmech

Master I from
ChonTM
on September 23rd, 2025
cp-ur 780 + cp-sr 390
40 cards
2 copies
Effect Veiler
Droll & Lock Bird
2 copies
Maxx "C"
3 copies
Ash Blossom & Joyous Spring
3 copies
Backup @Ignister
Firewall Guardian
Mathmech Addition
Mathmech Multiplication
Mathmech Sigma
Mathmech Subtraction
Mathmech Diameter
3 copies
Mathmech Circular
2 copies
Firewall Defenser
Mulcharmy Fuwalos
Wizard @Ignister
3 copies
Artifact Lancea
Nibiru, the Primal Being
A.I. Connect
3 copies
Cynet Mining
Mathmech Equation
2 copies
Called by the Grave
Crossout Designator
3 copies
Infinite Impermanence
Mathmech Superfactorial
Cyberse Desavewurm
Firewall Saber Dragon
Enigmaster Packbit
Primathmech Laplacian
Primathmech Alembertian
Allied Code Talker @Ignister
Linguriboh
Link Decoder
Cyberse Wicckid
Splash Mage
G Golem Crystal Heart
Transcode Talker
Decode Talker Heatsoul
Accesscode Talker
Firewall Dragon Darkfluid - Neo Tempest Terahertz

Prerequisites

  • A registered Konami ID linked to your master duel game
  • Must login to Yu-Gi-Oh! Cards DB using the same Konami ID
  • If the Yu-Gi-Oh! DB website asks to login with Game Card ID just click "I don't have a game card ID" and fill some basic information to proceed

Export Guide

- Via the MDM extension (Recommended): Download on Firefox, or Chromium Browsers
For Chromium browsers (Chrome/Edge/Opera/Brave...etc) just click "Add to chrome" on the store page and it'll work on most if not all chromium browsers.
After using the extension, go to the Master Duel game => Main menu => Deck option => The Card database option at the top right corner => locate the deck you exported and copy it
Don't show this again
- Manually
  1. Click here to copy the export code
    2.
  2. Go to Yu-Gi-Oh! Cards DB and click My Deck => Add a Deck
  3. Once the deck page loads click Edit then do one of the following based on the platform your device is running:
    • (PC Only): Press F12 to open the DevTools window => Navigate to the Console tab in the window => Paste the export code => Hit Enter
    • OR (Other platforms/PC): In the address bar of the current tab remove the URL and type "javascript:" without the quotations then paste the export code, then if you're on mobile look for the *globe* icon and tap on it to run the code (Chrome only), for PC users just hit enter.
  4. The deck will save automatically
  5. Go to the Master Duel game => Main menu => Deck option => The Card database option at the top right corner => locate the deck you exported and copy it

Click here for a more detailed guide

Notes & Combos

Mathmech remains a consistently enjoyable deck this season. However, competing against top-tier meta strategies such as Maliss and Ryzeal can be particularly challenging when going second, as one or two hand traps are often insufficient to disrupt the opponent’s plays. Nevertheless, when going first, the deck is still capable of securing victories against these matchups.

The release of Backup @Ignister and Allied Code has provided excellent support for all Cyberse archetypes, significantly strengthening their overall performance. From my perspective, facing Maliss tends to be more manageable than Ryzeal, as Artifact Lancea offers at least a potential countermeasure. Ultimately, though, much depends on the opening hand, which remains a critical factor in determining the outcome.

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Replays

877-706-441

That replay isn’t much different from other clips on YouTube. Most of the time, it’s about going first. Anyway, I hope you enjoy playing Yu-Gi-Oh! Thank you.

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