Mathmech

Master V from
MoriMorpho
on July 26th, 2025
cp-ur 600 + cp-sr 480
40 cards
2 copies
D.D. Crow
Effect Veiler
Dotscaper
2 copies
Maxx "C"
3 copies
Ash Blossom & Joyous Spring
Firewall Guardian
Mathmech Addition
Mathmech Multiplication
Mathmech Sigma
Mathmech Subtraction
2 copies
Mathmech Diameter
3 copies
Mathmech Circular
3 copies
Firewall Defenser
3 copies
Artifact Lancea
2 copies
Parallel eXceed
Nibiru, the Primal Being
2 copies
Cynet Mining
Mathmech Equation
Triple Tactics Talent
Small World
2 copies
Called by the Grave
Crossout Designator
3 copies
Infinite Impermanence
Mathmech Superfactorial
Cyberse Desavewurm
Enigmaster Packbit
2 copies
Primathmech Laplacian
Primathmech Alembertian
Salamangreat Almiraj
Linguriboh
Link Decoder
2 copies
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

Hi to anyone reading this! I'm Mori, previously a Duel Links player who had a keen interest in modern Yu-Gi-Oh, and thus I installed Master Duel! After getting adjusted to the system and meta, I'd say the ride is currently quite fun.

To be honest, I play Ranked simply for the gems, but since I was gaining momentum and ranking up fast, I decided to set my sights on Master Rank with my favorite decks: Resonator, Melodious, and the deck that finished the job, Mathmech Firewall.

If you're a newer player just like me, this deck is quite favorable! The secret packs (mostly Singular Striker Overthrow and Soldiers of the Storm) are very strong and cheap (Sky Strikers are apparently getting good support as well, and Code Talkers are pretty strong as well, shoutouts to Lifepointaker), as Mathmech can be splashed into a variety of Cyberse archetypes, even the most recent: Maliss (though MMM is slightly weaker than regular Malice). Mathmech as a sole archetype are a link-centric strategy with the ability to pivot into XYZ and Synchro summoning, namely Primathmech Alembertia and Laplacian or Geomathmech Final Sigma.

The deck is quite infamous for its ability to establish powerful disruptions such as Firewall Dragon Darkfluid = Neo Tempest Terahertz (potential spell negate, removal, or negate), and Mathmech Superfactorial (into Laplacian with Diameter's omni-negate), as well as supported by handtraps off of ONE card, namely Mathmech Circular or Firewall Defenser.

Other cyberse cards I use personally are Firewall Defenser, Dotscaper, Parallel EXceed, though Gatchiri @ignister and EM:P Meowmine are great too! Our handtrap lineup is relatively simple, but I would try to fit in Ghost Belle or more Nibs for a stronger Maliss matchup (I just don't have enough gems at the moment).

The climb was pretty smooth due to a combination of good luck, opponent misplays, and the Cyberse engine being able to push through handtraps. My worst games were to Blue Eyes and Labrynth, but cards such as Nibiru and the Bystials often led to a very subpar endboard. Link Spider could be an option for the former, though, preferably instead of a Laplacian. My Maliss matchups were 50/50, depending on starting hands and the coin flip, of course.

Overall, the deck's consistency, relatively easy combos, ability to run a variety of non-engine, fast OTK lines, archetypal support, immunity to Artifact Lancea and Droll make it a viable, strong, and cheap deck to climb with! Thank you for reading!

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