Firewall Mathmech
TCG · Mathmech · Tournament Meta Decks · 2023-08-30 · Source
Featured card
Primathmech Alembertian
One of the most-played Mathmech cards this deck runs.
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- 2 copies of Droll & Lock Bird, which is Limited (at most 1)
- 2 copies of Anti-Spell Fragrance, which is Limited (at most 1)
- Splash Mage is Forbidden
Checked against the OCG Forbidden & Limited list as of 8 November 2026, with the sizes and copy limits of a TCG deck.
Not checked: the TCG card pool (a card released only in the OCG).
Buy this deck — all 42 cards71 copies · about $60.02, main, extra and side deck
Main Deck
41 cards
Ash Blossom & Joyous Spring, copy 1 of 2. Semi-Limited on the OCG Forbidden & Limited list- Ash Blossom & Joyous Spring, copy 2 of 2. Semi-Limited on the OCG Forbidden & Limited list
Droll & Lock Bird, copy 1 of 2. Limited on the OCG Forbidden & Limited list — this deck holds more than the 1 allowed- Droll & Lock Bird, copy 2 of 2. Limited on the OCG Forbidden & Limited list — this deck holds more than the 1 allowed
Effect Veiler, copy 1 of 2- Effect Veiler, copy 2 of 2
Firewall Defenser, copy 1 of 3- Firewall Defenser, copy 2 of 3
- Firewall Defenser, copy 3 of 3
Firewall Guardian
Ghost Mourner & Moonlit Chill
Ghost Ogre & Snow Rabbit, copy 1 of 2- Ghost Ogre & Snow Rabbit, copy 2 of 2
Kurikara Divincarnate
Mathmech Addition, copy 1 of 2- Mathmech Addition, copy 2 of 2
Mathmech Circular
Mathmech Diameter, copy 1 of 2- Mathmech Diameter, copy 2 of 2
Mathmech Sigma, copy 1 of 2- Mathmech Sigma, copy 2 of 2
Mathmech Subtraction, copy 1 of 2- Mathmech Subtraction, copy 2 of 2
Nibiru, the Primal Being, copy 1 of 2- Nibiru, the Primal Being, copy 2 of 2
Parallel eXceed, copy 1 of 3- Parallel eXceed, copy 2 of 3
- Parallel eXceed, copy 3 of 3
Santa Claws
Crossout Designator. Limited on the OCG Forbidden & Limited list
Cynet Mining, copy 1 of 3- Cynet Mining, copy 2 of 3
- Cynet Mining, copy 3 of 3
Harpie's Feather Duster. Limited on the OCG Forbidden & Limited list
Mathmech Equation
Small World, copy 1 of 3- Small World, copy 2 of 3
- Small World, copy 3 of 3
Triple Tactics Talent, copy 1 of 2- Triple Tactics Talent, copy 2 of 2
Mathmech Superfactorial
Extra Deck
15 cards
Accesscode Talker
Cyberse Desavewurm
Decode Talker Heatsoul
Firewall Dragon Darkfluid - Neo Tempest Terahertz
G Golem Crystal Heart
Geomathmech Final Sigma
Linguriboh
Primathmech Alembertian, copy 1 of 2- Primathmech Alembertian, copy 2 of 2
Primathmech Laplacian
Salamangreat Almiraj
Splash Mage, copy 1 of 2. Forbidden on the OCG Forbidden & Limited list- Splash Mage, copy 2 of 2. Forbidden on the OCG Forbidden & Limited list
Transcode Talker
Update Jammer
Side Deck
15 cards · not counted toward completion
D.D. Crow, copy 1 of 3- D.D. Crow, copy 2 of 3
- D.D. Crow, copy 3 of 3
Dinowrestler Pankratops- Santa Claws
Cosmic Cyclone, copy 1 of 3- Cosmic Cyclone, copy 2 of 3
- Cosmic Cyclone, copy 3 of 3
Anti-Spell Fragrance, copy 1 of 2. Limited on the OCG Forbidden & Limited list — this deck holds more than the 1 allowed- Anti-Spell Fragrance, copy 2 of 2. Limited on the OCG Forbidden & Limited list — this deck holds more than the 1 allowed
Grave of the Super Ancient Organism, copy 1 of 3- Grave of the Super Ancient Organism, copy 2 of 3
- Grave of the Super Ancient Organism, copy 3 of 3
Royal Decree, copy 1 of 2- Royal Decree, copy 2 of 2