Firewall Mathmech
TCG · Mathmech · Meta Decks · 2023-08-30 · Source
Featured card
Mathmech Sigma
One of the most-played Mathmech cards this deck runs.
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- 3 copies of Dimensional Barrier, which is Limited (at most 1)
- 3 copies of Ash Blossom & Joyous Spring, which is Semi-Limited (at most 2)
- Splash Mage is Forbidden
- Called by the Grave 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 40 cards70 copies · about $51.92, main, extra and side deck
Main Deck
40 cards| Card | Type | In deck | Each |
|---|---|---|---|
 Ash Blossom & Joyous Spring Semi-Limited | Tuner | ×3 | $0.40 |
| Tuner | ×3 | $0.27 | |
| Effect | ×3 | $9.54 | |
| Effect | ×1 | $0.31 | |
| Tuner | ×2 | $0.65 | |
| Effect | ×1 | $0.19 | |
| Effect | ×1 | $0.25 | |
| Tuner | ×2 | $0.33 | |
| Tuner | ×1 | $0.58 | |
| Tuner | ×2 | $0.27 | |
| Effect | ×2 | $0.76 | |
| Effect | ×3 | $0.23 | |
| Effect | ×3 | $0.41 | |
| Effect | ×1 | $1.54 | |
 Called by the Grave Forbidden | Spell | ×1 | $0.14 |
 Crossout Designator Limited | Spell | ×1 | $0.26 |
| Spell | ×3 | $0.18 | |
| Spell | ×1 | $0.16 | |
| Spell | ×3 | $0.19 | |
| Spell | ×2 | $0.29 | |
| Trap | ×1 | $0.17 |
Extra Deck
15 cards| Card | Type | In deck | Each |
|---|---|---|---|
| Link | ×2 | $0.23 | |
| Fusion | ×1 | $0.15 | |
| Link | ×1 | $0.15 | |
| Link | ×1 | $1.40 | |
| Link | ×1 | $0.21 | |
| Link | ×1 | $0.12 | |
| Link | ×1 | $0.27 | |
| Xyz | ×1 | $0.49 | |
| Xyz | ×1 | $0.24 | |
| Link | ×1 | $0.15 | |
 Splash Mage Forbidden | Link | ×2 | $0.10 |
| Link | ×1 | $0.42 | |
| Link | ×1 | $0.10 |
Side Deck
15 cards · not counted toward completion| Card | Type | In deck | Each |
|---|---|---|---|
| Tuner | ×3 | $0.84 | |
| Effect | ×3 | $0.25 | |
| Spell | ×3 | $0.04 | |
 Harpie's Feather Duster Limited | Spell | ×1 | $0.93 |
| Spell | ×2 | $0.42 | |
 Dimensional Barrier Limited | Trap | ×3 | $0.18 |
