Mathmech

Master V from
MoriMorpho
on October 13th, 2025
cp-ur 780 + cp-sr 450
43 cards
3 copies
D.D. Crow
3 copies
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
3 copies
Firewall Defenser
3 copies
Mulcharmy Fuwalos
Wizard @Ignister
2 copies
Parallel eXceed
A.I. Connect
2 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
Salamangreat Almiraj
Linguriboh
Link Decoder
Cyberse Wicckid
Splash Mage
G Golem Crystal Heart
Transcode Talker
Decode Talker Heatsoul
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

Okay. Wow...

Hello, and welcome to another yap-session for every decklist I post on this website-AHHHHHHHHHH!

Safe to say, this run was not my greatest. I was alternating between Maliss and Mathmech @Ignister, the former since I enjoy slightly de-powered meta decks. Mathmech finished the climb from Diamond 3-1, though it was certainly not a smooth climb. I deranked from D3-D2 on three separate occasions, which definitely was not delightful. Still, I endured and toiled anyway. Here are some changes from my previous decklist, designed for the growing threats of the meta:

-3 D.D. Crow: This card was actually pretty solid. A monster hand trap with the ability to banish any cards in your opponent's graveyard is useful for decks such as Fiendsmith, Orcust, Mitsurugi, Tearlaments, Gem-Knight, and (sometimes) Maliss; these were all decks I commonly faced. On top of that, it can be used as link material for Salamangreat Almiraj.

-3 Droll and Lock Bird: This card was once a two-of in my deck, but three seems mandatory against the prevalent Mitsurugi deck and its variants, especially Ryzeal. However, this card does hurt us quite a bit when used by the opposition, rendering our boards very lackluster. It can facilitate lines against Maxx C and Fuwalos, of course. Speaking of which:

-3 Mulcharmy Fuwalos: Due to the forbidden list, I actually have the UR to craft a lot of missing staples/engine! Fuwalos is a very strong card if resolved, and you are likely to get a draw or more with it, deterring opponents into making half-boards or nothing at all. Cyberse decks can often gas through half-boards and OTK, so cards like this are very nice to have.

-2 Parallel eXceed: I wanted to splash more engine due to adding more hand-traps, so I opted for Parallel eXceed once again. Even though it loses to a Detonator or Impulse, the ability to summon two level 4 Cyberse bodies off of one link summon bridges into both Wicckid and Mathmech engines.

-(Removed): The Micro Coder package, while really fun to search Conflict, felt unnecessary and bricky when going second. One A.I. Connect (formerly two) seemed adequate since we search it anyway, and I wanted to keep the 40-43 card mark.

Overall, this climb was TOUGH! Easily, the most times I have gotten Maxx C'd and Fuwalos'd, or completely blown out. Can't say it was just luck, since my sequencing was terrible from tilt or negligence, though. Those new decks do not play around; that is all I can say.

Show more
  • Cards
  • DeckTypes
  • Articles
  • Users