Crystron K9

Master I from
The Mad Walrus
on February 9th, 2026
cp-ur 1050 + cp-sr 450
40 cards
2 copies
Droll & Lock Bird
Maxx "C"
Crystron Citree
Crystron Tristaros
Scrap Recycler
Crystron Smiger
3 copies
Ash Blossom & Joyous Spring
3 copies
Mulcharmy Fuwalos
2 copies
Mulcharmy Purulia
2 copies
Crystron Sulfefnir
3 copies
Crystron Sulfador
2 copies
K9-04 Noroi
3 copies
K9-17 Izuna
2 copies
K9-66a Jokul
K9-66b Lantern
K9-ØØ Lupis
3 copies
Crystron Inclusion
2 copies
"A Case for K9"
Called by the Grave
K9-X Forced Release
3 copies
Infinite Impermanence
Crystron Cluster
F.A. Dawn Dragster
Crystron Eleskeletus
Crystron Quariongandrax
Number 102: Star Seraph Sentry
Cyber Dragon Nova
Infinitrack River Stormer
N.As.H. Knight
K9-17 "Ripper"
Vallon, the Super Psy Skyblaster
Cyber Dragon Infinity
K9-X "Werewolf"
Divine Arsenal AA-ZEUS - Sky Thunder
Super Starslayer TY-PHON - Sky Crisis
Clockwork Knight
Platinum Gadget

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

Crystron best K9 variant, don't doubt me :smile: Instead of pairing K9 with another deck that is bad into droll why not use one that runs the droll to counter charmies?

Nothing terribly noteworthy about the build, I do run the extra brick with citree simply because I like the extra tuner in a pinch and making Quariongandrax gives me the big smile.

102 as the N.As.H. material because there isn't enough room for the full double succ rank up tech and in the odd situation that the opponent steals him after he resolved they can't make the monster negate without 104 attached.

Any questions just @ me on discord.

Show more
  • Cards
  • DeckTypes
  • Articles
  • Users