Mathmech

King of Games from Cipher21 on October 15th, 2026
Gems 35k
Skill Mathmech Slicer
21 cards
UR Rarity
Mathmech Sigma
UR Rarity
Mathmech Sigma
UR Rarity
Mathmech Sigma
UR Rarity
Effect Veiler
UR Rarity
Effect Veiler
SR Rarity
Mathmech Diameter
SR Rarity
Mathmech Diameter
SR Rarity
Mathmech Diameter
SR Rarity
Mathmech Addition
SR Rarity
Kiteroid
SR Rarity
Kiteroid
R Rarity
Mathmech Nabla
R Rarity
Mathmech Nabla
N Rarity
Mathmech Multiplication
N Rarity
Mathmech Multiplication
SR Rarity
Book of Eclipse
SR Rarity
Book of Eclipse
SR Rarity
Book of Eclipse
N Rarity
Mathmech Billionblade Nayuta
N Rarity
Mathmech Equation
R Rarity
Mathmech Superfactorial
SR Rarity
Geomathmech Final Sigma
SR Rarity
Geomathmech Final Sigma
SR Rarity
Geomathmech Magma
UR Rarity
Number 60: Dugares the Timeless
R Rarity
Primathmech Laplacian
R Rarity
Primathmech Laplacian
UR Rarity
Decode Talker Heatsoul
SR Rarity
S-Force Justify
SR Rarity
Splash Mage

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

This deck is doing pretty well against top tier meta decks. Idk why it was removed from Tier 3, I really don't have any issues facing Branded, Vaal, Snake Eyes, Shining Sarco and Horus. Just kill/negate their core cards like Shining/King Sarco, Oak, Selettrice and you're good to go. Mementot depends on your gameplay you can see the example in my replays.

Show more

Replays

  • Cards
  • Skills
  • Articles
  • Other