Mathmech Addition

Cyberse/Effect

You can target 1 face-up monster on the field; you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except Cyberse monsters, also Special Summon this card from your hand (but it cannot attack this turn), and if you do, the targeted monster gains 1000 ATK until the end of this turn. You can only use this effect of "Mathmech Addition" once per turn.

Mathmech Diameter

Cyberse/Tuner/Effect

When this card is Normal Summoned: You can target 1 Level 4 Cyberse monster in your GY; Special Summon it, but it cannot activate its effects. A "Mathmech" monster that was Synchro or Xyz Summoned using this card on the field as material gains the following effect.
• Once per turn, during the turn this card was Special Summoned, when your opponent activates a card or effect (Quick Effect): You can negate that effect.
You can only use each effect of "Mathmech Diameter" once per turn.

Mathmech Division

Cyberse/Effect

You can Tribute 1 Cyberse monster you control in the Extra Monster Zone; Special Summon up to 1 Level 4 Cyberse monster each from your hand and GY. If this card is sent to the GY: You can target 1 face-up monster on the field; its ATK becomes halved until the end of this turn. You can only use each effect of "Mathmech Division" once per turn.

Mathmech Multiplication

Cyberse/Effect

You can target 1 Level 4 Cyberse monster you control; its Level becomes 8 until the end of this turn. If this card is sent to the GY: You can target 1 Cyberse monster you control in the Extra Monster Zone; its ATK becomes doubled until the end of this turn. You can only use each effect of "Mathmech Multiplication" once per turn.

Mathmech Nabla

Cyberse/Tuner/Effect

You can Tribute 1 Cyberse monster; Special Summon 1 "Mathmech" monster from your Deck. If this card is sent to the GY: You can target 1 Cyberse monster you control in the Extra Monster Zone; it can make up to 2 attacks on monsters during each Battle Phase this turn. You can only use each effect of "Mathmech Nabla" once per turn.

Mathmech Sigma

Cyberse/Tuner/Effect

If you control no monsters in the Extra Monster Zone, while this card is in your hand or GY: You can Special Summon this card, but banish it when it leaves the field, also you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except Cyberse monsters. You can only use this effect of "Mathmech Sigma" once per turn. If this card you control is used as Synchro Material for a "Mathmech" monster, you can treat it as a non-Tuner.

Mathmech Subtraction

Cyberse/Effect

You can target 1 face-up monster on the field; you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except Cyberse monsters, also Special Summon this card from your hand (but it cannot attack this turn), and if you do, the targeted monster loses 1000 ATK until the end of this turn. You can only use this effect of "Mathmech Subtraction" once per turn.

ROM Cloudia

Cyberse/Effect

When this card is Normal Summoned: You can target 1 Cyberse monster in your GY, except "ROM Cloudia"; add it to your hand. If this card is destroyed by battle or card effect: You can Special Summon 1 Level 4 or lower Cyberse monster from your Deck, except "ROM Cloudia".

Cynet Mining

Send 1 card from your hand to the GY; add 1 Level 4 or lower Cyberse monster from your Deck to your hand. You can only activate 1 "Cynet Mining" per turn.

Mathmech Billionblade Nayuta

Equip only to a Cyberse monster. If the equipped monster battles an opponent's monster, during damage calculation: You can send 1 "Mathmech" monster from your Deck to the GY; the equipped monster gains ATK equal to the sent monster's ATK, until the end of this turn (even if this card leaves the field). If this card is sent from the Spell & Trap Zone to the GY: You can target 1 "Mathmech" card in your GY, except "Mathmech Billionblade Nayuta"; add it to your hand. You can only use each effect of "Mathmech Billionblade Nayuta" once per turn.

Mathmech Equation

Target 1 "Mathmech" monster in your GY; Special Summon it, and if you do, it gains 1000 ATK until the end of this turn. You can only activate 1 "Mathmech Equation" per turn.

Mathmech Induction

All Cyberse monsters you control gain 500 ATK. If you control a "Mathmech" monster: You can send this face-up card from the field to the GY, then target 1 card your opponent controls; destroy it. You can only use this effect of "Mathmech Induction" once per turn.

Mathmech Superfactorial

Target up to 3 "Mathmech" monsters in your GY with different names, then activate 1 of these effects;
• Special Summon them, but their effects are negated, then, immediately after this effect resolves, Synchro Summon 1 "Mathmech" Synchro Monster using only those monsters, and shuffle the materials into the Deck instead of sending them to the GY.
• Special Summon them, but their effects are negated, then, immediately after this effect resolves, Xyz Summon 1 "Mathmech" Xyz Monster using only those monsters.
You can only activate 1 "Mathmech Superfactorial" per turn.

Solemn Strike

When a monster(s) would be Special Summoned, or a monster effect is activated: Pay 1500 LP; negate the Summon or activation, and if you do, destroy that card.

Trap Trick

Banish 1 Normal Trap from your Deck, except "Trap Trick", and if you do, Set 1 card with the same name as that card from your Deck. It can be activated this turn. For the rest of this turn after this card resolves, you can only 1 activate Trap Card. You can only activate 1 "Trap Trick" per turn.

Firewall Dragon

Cyberse/Link/Effect

2+ monsters
Once while face-up on the field (Quick Effect): You can target monsters on the field and/or GY up to the number of monsters co-linked to this card; return them to the hand. If a monster this card points to is destroyed by battle or sent to the GY: You can Special Summon 1 monster from your hand.

I:P Masquerena

Cyberse/Link/Effect

2 non-Link Monsters
During your opponent's Main Phase, you can (Quick Effect): Immediately after this effect resolves, Link Summon 1 Link Monster using materials you control, including this card. You can only use this effect of "I:P Masquerena" once per turn. A Link Monster that used this card as material cannot be destroyed by your opponent's card effects.

Knightmare Cerberus

Fiend/Link/Effect

2 monsters with different names
If this card is Link Summoned: You can discard 1 card, then target 1 Special Summoned monster in your opponent's Main Monster Zone; destroy it, then if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of "Knightmare Cerberus" once per turn. Your co-linked monsters cannot be destroyed by card effects.

Knightmare Phoenix

Fiend/Link/Effect

2 monsters with different names
If this card is Link Summoned: You can discard 1 card, then target 1 Spell/Trap your opponent controls; destroy it, then, if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of "Knightmare Phoenix" once per turn. Co-linked monsters you control cannot be destroyed by battle.

Proxy Dragon

Cyberse/Link/Effect

2 monsters
If a card(s) you control would be destroyed by battle or card effect, you can destroy 1 of your monsters this card points to, instead.

Geomathmech Final Sigma

Cyberse/Synchro/Effect

1 Tuner + 1+ non-Tuner monsters
Unaffected by card effects, except "Mathmech" cards, while in the Extra Monster Zone. If this card in the Extra Monster Zone battles an opponent's monster, any battle damage it inflicts to your opponent is doubled. If this card is destroyed by battle, or if this card in its owner's possession is destroyed by an opponent's card effect: You can add 1 "Mathmech" card from your Deck to your hand. You can only use this effect of "Geomathmech Final Sigma" once per turn.

Geomathmech Magma

Cyberse/Synchro/Tuner/Effect

1 Tuner + 1+ non-Tuner monsters
When this card destroys a monster by battle: You can target up to 2 cards your opponent controls; destroy them. If this card is destroyed by battle, or if this card in its owner's possession is destroyed by an opponent's card effect: You can add 1 "Mathmech" Spell/Trap from your Deck to your hand. You can only use each effect of "Geomathmech Magma" once per turn.

Primathmech Alembertian

Cyberse/Xyz/Effect

2+ Level 4 monsters
You can Tribute 1 monster; Special Summon 1 Level 4 "Mathmech" monster from your hand or GY. If this card is Xyz Summoned: You can detach 2 to 4 materials from this card, then activate the appropriate effect;
• 2: Add 1 "Mathmech" card from your Deck to your hand.
• 3: Add 1 Level 4 monster from your Deck to your hand.
• 4: Add 1 Spell/Trap from your Deck to your hand.
You can only use each effect of "Primathmech Alembertian" once per turn.

Primathmech Laplacian

Cyberse/Xyz/Effect

3 Level 4 monsters
If a "Mathmech" card(s) you control would be destroyed by card effect, you can detach 1 material from this card instead. If this card is Xyz Summoned: You can detach up to 3 materials from it, then choose that many effects (you cannot choose the same effect twice, and you resolve them in the listed order, skipping any that were not chosen);
• Send 1 random card from your opponent's hand to the GY.
• Send 1 monster your opponent controls to the GY.
• Send 1 Spell/Trap your opponent controls to the GY.
You can only use this effect of "Primathmech Laplacian" once per turn.