Subterror Deck Breakdown

LIGHT 2

When this card is Normal Summoned: Add 1 "Cyber" Spell/Trap from your Deck to your hand. If only your opponent controls a monster: You can banish this card from your GY; Special Summon 1 "Cyber Dragon" monster from your Deck. You can only use 1 "Cyber Dragon Core" effect per turn, and only once that turn. This card's name becomes "Cyber Dragon" while on the field or in the GY.

EARTH 7

If your opponent controls more monsters than you do, you can Special Summon this card (from your hand). You can only Special Summon "Dinowrestler Pankratops" once per turn this way. (Quick Effect): You can Tribute 1 "Dinowrestler" monster, then target 1 card your opponent controls; destroy it. You can only use this effect of "Dinowrestler Pankratops" once per turn.

LIGHT 8

To Tribute Summon this card face-up, you can Tribute Continuous Spell/Trap Card(s) you control, as well as monsters. Unaffected by the effects of cards with the same card type (Monster, Spell, and/or Trap) as the original card type of the cards Tributed for its Tribute Summon. Once per turn, during either player's turn, if you control this Tribute Summoned monster: You can banish 1 Continuous Spell/Trap Card from your Graveyard, then target 1 other card on the field; destroy it.

EARTH 1

When your opponent activates a card or effect (Quick Effect): You can send this card from your hand or field to the GY, then target 1 "Subterror" monster you control; negate the activation, then change the targeted monster to face-down Defense Position. You can target 1 face-up monster you control; change it to face-down Defense Position, and if you do, Special Summon 1 "Subterror" monster from your hand or GY, in face-up or face-down Defense Position. You can only use each effect of "Subterror Fiendess" once per turn.

EARTH 3

At the start of the Damage Step, if this card attacks an opponent's face-down Defense Position monster, and you control another "Subterror" monster: You can shuffle that opponent's monster into the Deck. If this card on the field is destroyed by battle or card effect and sent to the GY: You can Special Summon 1 "Subterror" monster from your Deck in face-up or face-down Defense Position. You can only use each effect of "Subterror Nemesis Archer" once per turn.

EARTH 7

FLIP: You can target 1 monster your opponent controls; banish it. You can only use this effect of "Subterror Behemoth Umastryx" once per turn. When a face-up monster you control is flipped face-down, if you control no face-up monsters: You can Special Summon this card from your hand in Defense Position. Once per turn: You can change this card to face-down Defense Position.

EARTH 9

FLIP: You can target 1 Set monster your opponent controls; take control of it until your next End Phase. You can only use this effect of "Subterror Behemoth Voltelluric" once per turn. When a face-up monster you control is flipped face-down, if you control no face-up monsters: You can Special Summon this card from your hand in Defense Position. Once per turn: You can change this card to face-down Defense Position.

EARTH 4

FLIP: You can add 1 "Subterror" card from your Deck to your hand, except "Subterror Guru". You can target 1 other face-up monster on the field; change that monster, also this card, to face-down Defense Position. This is a Quick Effect if you control another "Subterror" card. You can only use each effect of "Subterror Guru" once per turn.

Spell Continuous

All face-up monsters on the field become Machine monsters. Machine monsters you control gain 500 ATK/DEF, also Machine monsters your opponent controls lose 500 ATK/DEF. You can banish this card from your GY, then discard 1 card; add 1 EARTH Machine monster from your Deck to your hand. You can only use this effect of "Clockwork Night" once per turn. You can only activate 1 "Clockwork Night" per turn.

Spell Continuous

When this card is activated: You can add 1 "Cyberdark" monster from your Deck to your hand, with a different name from the cards in your GY. During your Main Phase, you can: Immediately after this effect resolves, Normal Summon 1 "Cyberdark" monster. You can only use the previous effect of "Cyberdark Realm" once per turn. If you equip a monster from your GY by the effect of a "Cyberdark" monster that activated when it was Normal or Special Summoned, you can equip from your opponent's GY instead. You can only activate 1 "Cyberdark Realm" per turn.

Spell Normal

Excavate the top 3 cards of your Deck, add 1 of them to your hand, also, after that, shuffle the rest back into your Deck. You can only activate 1 "Pot of Duality" per turn. You cannot Special Summon during the turn you activate this card.

Spell Normal

At the start of your Main Phase 1: Banish 3 or 6 random face-down cards from your Extra Deck, face-down; draw 1 card for every 3 cards banished. For the rest of this turn after this card resolves, you cannot draw any cards by card effects.

Spell Normal

Banish 3 or 6 cards of your choice from your Extra Deck, face-down; for the rest of this turn after this card resolves, any damage your opponent takes is halved, also excavate cards from the top of your Deck equal to the number of cards banished, add 1 excavated card to your hand, place the rest on the bottom of your Deck in any order. You can only activate 1 "Pot of Prosperity" per turn. You cannot draw cards by card effects the turn you activate this card.

Spell Quick

Discard 1 card; Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters from either field as Fusion Material. Neither player can activate cards or effects in response to this card's activation.

Spell Normal

Add 1 Field Spell from your Deck to your hand.

Spell Field

When this card is activated: You can add 1 "Subterror" monster from your Deck to your hand. Once per turn: You can change 1 face-down Defense Position "Subterror" monster you control to face-up Attack or Defense Position. Once per turn, when an opponent's monster declares an attack: You can change 1 face-down Defense Position "Subterror" monster you control to face-up Attack or Defense Position, then you can negate the attack. You can only activate 1 "The Hidden City" per turn.

Spell Normal

Your opponent cannot activate monster effects in response to this card's activation. Send 1 monster from your Extra Deck to the GY, then target 1 monster your opponent controls with the same card type (Fusion, Synchro, Xyz, Pendulum, or Link); shuffle it into the Deck.

Trap Normal

Target 1 monster on the field; return that target to the hand.

Trap Normal

Change as many monsters on the field as possible to face-down Defense Position, then, if either player controls a face-up monster(s), they must send all face-up monsters they control to the GY.

Trap Normal

Target 1 face-up monster your opponent controls; send 1 monster with an equal or higher ATK from your Extra Deck to the GY, and if you do, destroy that monster. Until the end of your next turn after this card resolves, you cannot Special Summon monsters from the Extra Deck. You can only activate 1 "Dogmatika Punishment" per turn.

Trap Continuous

All Level 6 or higher Special Summoned monsters on the field cannot declare attacks or activate their effects.

Trap Counter

When a Spell/Trap Card, or monster effect, is activated on the field: Pay half your LP; negate the activation, and if you do, destroy that card, then destroy any other cards in the same column the destroyed card was in, that are in the Monster Zones or Spell & Trap Zones.

Trap Continuous

Activate this card only if you currently control no Special Summoned monsters. While a monster is face-up on the field, negate its effects during the turn that monster was Special Summoned. If an Effect Monster(s) is Special Summoned in Attack Position: Change it to Defense Position.

Trap Continuous

Each player can only control 1 Type of monster. Send all other face-up monsters they control to the GY.

Trap Counter

When a monster(s) would be Summoned, OR a Spell/Trap Card is activated: Pay half your LP; negate the Summon or activation, and if you do, destroy that card.

Trap Normal

Activate 1 of these effects, also, after that, Set this card face-down instead of sending it to the GY. ● Change 1 Set "Subterror" monster on the field to face-up Attack or Defense Position. ● Change 1 face-up "Subterror" monster on the field to face-down Defense Position. ● ATK/DEF of 1 "Subterror" monster on the field become equal to its combined original ATK/DEF until the end of this turn. ● This turn, activated effects of "Subterror" cards cannot be negated.

Trap Continuous

Neither player can Summon more than two times per turn. (Negated Summons count toward this limit. Negated cards/effects that would Summon do not count.)

Trap Normal

Target 1 monster in your opponent's GY; Special Summon it to your opponent's field, then you can banish 1 monster your opponent controls, then if your opponent has a banished monster(s), return 1 of them to the GY. You can banish this card from your GY, except the turn it was sent there, then target 1 Level 1 monster in your GY; shuffle that monster into the Deck, then you can Set 1 "Terrors of the Underroot", "Terrors of the Overroot", or "Terrors of the Afterroot" from your Deck.

Trap Continuous

Each player can only control 1 monster of each Type. If a player controls 2 or more monsters of the same Type, they must send some to the GY so they control no more than 1 monster of that Type.

DARK 8

"Cyber Dragon" + 1+ Machine monsters Cannot be used as Fusion Material. Must first be Special Summoned (from your Extra Deck) by sending the above cards from either field to the GY. (You do not use "Polymerization".) The original ATK of this card becomes 1000 x the number of Fusion Materials used for its Special Summon.

LIGHT 4

1 Synchro Monster + 1 Xyz Monster Must be Special Summoned (from your Extra Deck) by sending the above cards you control to the GY. (You do not use "Polymerization".) Once per turn: You can Special Summon 1 Level 4 monster from your hand. If this card is sent to the GY: You can target 1 card on the field; destroy it. You can only Special Summon "Elder Entity N'tss(s)" once per turn.

EARTH 6

1 Rock monster + 1 Level 5 or 6 monster Must first be Special Summoned with "Fossil Fusion". If this card attacks a Defense Position monster, inflict piercing battle damage. When this attacking card destroys a monster by battle: You can activate this effect; this card can make a second attack in a row. You can banish this card from your GY, then target 1 monster on the field; destroy it. You can only use this effect of "Fossil Warrior Skull Knight" once per turn.

DARK 6

2 monsters with the same Type and Attribute, but different names Any battle damage your opponent takes from battles involving this card is doubled. If this card is sent to the GY: You can draw 1 card. You can only use this effect of "Garura, Wings of Resonant Life" once per turn.

WATER 4

2 monsters with the same Attribute but different Types Your opponent cannot target this card, or monsters on the field with the same Attribute as this card, with card effects. Once per turn (Quick Effect): You can declare 1 Attribute; this card becomes that Attribute until the end of this turn.

DARK 8

"Thunder Dragon" + 1 Thunder monster Must be either Fusion Summoned, or Special Summoned during the turn a Thunder monster's effect was activated in the hand, by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization"). Cards cannot be added from the Main Deck to your opponent's hand except by drawing them. If this card would be destroyed by battle or card effect, you can banish 1 Thunder monster from your GY instead.

EARTH

2 monsters, including an EARTH monster (This card is always treated as a "Familiar-Possessed" card.) You can target 1 EARTH monster in your opponent's GY; Special Summon it to your zone this card points to. If this Link Summoned card is destroyed by battle, or is destroyed by an opponent's card effect while in its owner's Monster Zone: You can add 1 EARTH monster with 1500 or less DEF from your Deck to your hand. You can only use each effect of "Aussa the Earth Charmer, Immovable" once per turn.

EARTH

1 non-Link Machine monster with 1000 or less original ATK If this card is Link Summoned: You can send 1 face-up Continuous Spell you control to the GY; add 1 "Clockwork Night" from your Deck to your hand. You can target 1 Machine monster with 1000 or less ATK in your GY; Tribute 1 other Machine monster, and if you do, Special Summon the targeted monster in Defense Position. You can only use each effect of "Clockwork Knight" once per turn.

WATER

2 "Paleozoic" monsters Unaffected by other monsters' effects. You can only use each of the following effects of "Paleozoic Cambroraster" once per turn. You can target 1 Set card in the Spell & Trap Zone; send it to the GY, and if you do, Set 1 "Paleozoic" Trap directly from your Deck. It can be activated this turn. If a Set card(s) you control would be destroyed by card effect, you can banish this card from your field or GY instead.

EARTH

2 Beast, Beast-Warrior, and/or Winged Beast monsters During your Main Phase: You can Special Summon 1 Level 4 or lower Beast, Beast-Warrior, or Winged Beast monster from your hand, also you cannot use monsters as Link Material for the rest of this turn, except Beast, Beast-Warrior, or Winged Beast monsters. If this card is sent to the GY: You can draw 1 card, then place 1 card from your hand on the bottom of the Deck. You can only use each effect of "Tri-Brigade Ferrijit the Barren Blossom" once per turn.

LIGHT 8

1 Tuner + 1+ non-Tuner monsters Once per turn, during the Main Phase (Quick Effect): You can banish both this face-up card from the field and 1 random card from your opponent's hand, face-up, until your next Standby Phase. Once per turn, during your opponent's Standby Phase: You can target 1 banished card; return it to the GY. If this card is in your GY: You can target 1 other card in the GY; shuffle both that card and this card from the GY into the Deck.

DARK

2+ Level 9 monsters If this card is Xyz Summoned: You can send 1 monster from your Extra Deck to the GY. You can target monsters in your GY, up to the number of materials this card has; detach materials from this card equal to the number of those targets in the GY, and if you do, attach those targets to this card as material. If this card is sent to the GY: You can target 1 face-up card on the field; negate its effects until the end of this turn. You can only use each effect of "Mereologic Aggregator" once per turn.