Subterror Deck Breakdown

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.

LIGHT

3 Level 6 LIGHT Machine monsters Once per turn, you can also Xyz Summon "Cyber Dragon Infinity" by using "Cyber Dragon Nova" you control as material. (Transfer its materials to this card.) Gains 200 ATK for each material attached to it. Once per turn: You can target 1 face-up Attack Position monster on the field; attach it to this card as material. Once per turn, when a card or effect is activated (Quick Effect): You can detach 1 material from this card; negate the activation, and if you do, destroy it.

LIGHT

2 Level 5 Machine monsters Once per turn: You can detach 1 material from this card, then target 1 "Cyber Dragon" in your GY; Special Summon that target. Once per turn (Quick Effect): You can banish 1 "Cyber Dragon" from your hand or face-up from your Monster Zone; this card gains 2100 ATK until the end of this turn. If this card in your possession is sent to your GY by your opponent's card effect: You can Special Summon 1 Machine Fusion Monster from your Extra Deck.

Spell Continuous

Any monster sent to the Graveyard is banished instead.

WATER

2 Level 4 monsters While this card has a material attached that was originally WATER, all WATER monsters you control gain 500 ATK. Once per turn (Quick Effect): You can detach 1 material from this card; your opponent cannot activate any card effects in their GY this turn.

EARTH 7

"Etoile Cyber" + "Blade Skater" A Fusion Summon of this card can only be conducted with the above Fusion Material Monsters. While your opponent controls only 1 monster, this card cannot be destroyed by battle. While your opponent controls only 2 monsters, double this card's ATK. While your opponent controls only 3 monsters, negate the effects of your opponent's Spell, Trap, and Effect Monster Cards.

DARK 1

"Relinquished" + "Thousand-Eyes Idol" Other monsters on the field cannot change their battle positions or attack. Once per turn: You can target 1 monster your opponent controls; equip that target to this card (max. 1). This card's ATK/DEF become equal to that equipped monster's. If this card would be destroyed by battle, destroy that equipped monster instead.

DARK 2

2 Normal Monsters

Trap Normal

When a monster(s) is Summoned: Destroy all monsters on the field.

Trap Counter

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 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.

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.

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.

Trap Normal

Banish 1 Normal Trap from your Deck, except "Trap Trick", and Set 1 card with the same name directly from your Deck, also it can be activated this turn. You can only activate 1 Trap Card for the rest of this turn after this card resolves. You can only activate 1 "Trap Trick" per turn.

WIND 5

"Cave Dragon" + "Lesser Fiend" (This card is always treated as an "Archfiend" card.) A Fusion Summon of this card can only be done with the above Fusion Material Monsters. Negate the effects of Flip Effect Monsters. Negate any Trap effects that target this card on the field, and if you do, destroy that Trap 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.

WATER

2 Level 5 monsters Once per turn, you can also Xyz Summon "Xyz Armor Fortress" by using 1 Rank 3 or 4 Xyz Monster you control. (Transfer its materials to this card.) Cannot be used as material for an Xyz Summon while it has material. Once per turn: You can detach up to 2 materials from this card; add "Armored Xyz" cards with different names from your Deck to your hand, equal to the number detached. If a monster equipped with this card battles a monster, any battle damage it inflicts to your opponent is doubled.

DARK 10

During your Main Phase: You can activate this effect; this card in your hand becomes revealed until the end of your opponent's turn. While this card is revealed by this effect, Set cards on the field cannot be destroyed by card effects. If a Set Spell/Trap Card is activated (except during the Damage Step): You can Special Summon this card from your hand, then, if you activated this effect while this card was revealed, you can reveal and Set 1 Spell/Trap directly from your Deck, but banish it during the End Phase of the next turn. You can only use 1 "Lord of the Heavenly Prison" effect per turn, and only once that turn.

LIGHT 11

During the Main Phase, if your opponent Normal or Special Summoned 5 or more monsters this turn (Quick Effect): You can Tribute as many face-up monsters on the field as possible, and if you do, Special Summon this card from your hand, then Special Summon 1 "Primal Being Token" (Rock/LIGHT/Level 11/ATK ?/DEF ?) to your opponent's field. (This Token's ATK/DEF become the combined original ATK/DEF of the Tributed monsters.) You can only use this effect of "Nibiru, the Primal Being" once per turn.

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.

Trap Normal

Take 1 Field Spell from your Deck, and either activate it or add it to your hand.

Trap Continuous

When this card resolves: You can Special Summon 1 "Helios - The Primordial Sun" from your hand or Deck. While this card is face-up on the field, any card sent to the Graveyard is banished instead.

Trap Normal

Banish 1 Fusion Monster and 2 Xyz Monsters with the same Rank from your Extra Deck, whose combined Level and Ranks equal the total number of cards in both players' hands and on the field, then you can apply this effect. ● Return 2 of your banished monsters to the Extra Deck (1 Xyz and 1 Fusion) whose combined Level and Rank equal the Level or Rank of 1 face-up monster your opponent controls, then banish all cards they control.

WATER

2 Level 4 WATER monsters Once per turn: You can detach 1 material from this card; Special Summon 1 Rank 3 or lower WATER Xyz Monster from your Extra Deck. This card cannot attack for the rest of this turn.

WATER

2 Level 6 Fiend monsters When a Spell/Trap Card, or monster effect, is activated that includes an effect that Special Summons a monster (Quick Effect): You can detach 1 material from this card; negate the activation, and if you do, destroy that card, then you can make 1 other "D/D" monster you control and this card gain 1800 ATK until the end of this turn. If this card is sent from the field to the GY: You can add 1 "Dark Contract" card 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.

LIGHT

2 Level 3 monsters Once per turn: You can detach 1 Xyz Material from this card, then target 1 "Djinn" Xyz Monster you control; it can make a second attack during each Battle Phase this turn.

EARTH

2 Level 3 monsters Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, then target 1 face-up Xyz Monster your opponent controls; detach 1 Xyz Material from that monster, and if you do, all "Djinn" Xyz Monsters you currently control gain 500 ATK.

DARK 3

"Skull Servant" + "Dissolverock"

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.

DARK 10

During your Main Phase: You can activate this effect; this card in your hand becomes revealed until the end of your opponent's turn. While this card is revealed by this effect, Set cards on the field cannot be destroyed by card effects. If a Set Spell/Trap Card is activated (except during the Damage Step): You can Special Summon this card from your hand, then, if you activated this effect while this card was revealed, you can reveal and Set 1 Spell/Trap directly from your Deck, but banish it during the End Phase of the next turn. You can only use 1 "Lord of the Heavenly Prison" effect per turn, and only once that turn.

LIGHT 11

During the Main Phase, if your opponent Normal or Special Summoned 5 or more monsters this turn (Quick Effect): You can Tribute as many face-up monsters on the field as possible, and if you do, Special Summon this card from your hand, then Special Summon 1 "Primal Being Token" (Rock/LIGHT/Level 11/ATK ?/DEF ?) to your opponent's field. (This Token's ATK/DEF become the combined original ATK/DEF of the Tributed monsters.) You can only use this effect of "Nibiru, the Primal Being" once per turn.

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.

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.

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

2 Level 4 monsters While this card has a material attached that was originally WATER, all WATER monsters you control gain 500 ATK. Once per turn (Quick Effect): You can detach 1 material from this card; your opponent cannot activate any card effects in their GY this turn.

WATER

2 Level 4 WATER monsters Once per turn: You can detach 1 material from this card; Special Summon 1 Rank 3 or lower WATER Xyz Monster from your Extra Deck. This card cannot attack for the rest of this turn.

LIGHT

3 Level 6 LIGHT Machine monsters Once per turn, you can also Xyz Summon "Cyber Dragon Infinity" by using "Cyber Dragon Nova" you control as material. (Transfer its materials to this card.) Gains 200 ATK for each material attached to it. Once per turn: You can target 1 face-up Attack Position monster on the field; attach it to this card as material. Once per turn, when a card or effect is activated (Quick Effect): You can detach 1 material from this card; negate the activation, and if you do, destroy it.

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

Take 1 Field Spell from your Deck, and either activate it or add it to your hand.

Trap Normal

Banish 1 Fusion Monster and 2 Xyz Monsters with the same Rank from your Extra Deck, whose combined Level and Ranks equal the total number of cards in both players' hands and on the field, then you can apply this effect. ● Return 2 of your banished monsters to the Extra Deck (1 Xyz and 1 Fusion) whose combined Level and Rank equal the Level or Rank of 1 face-up monster your opponent controls, then banish all cards they control.

Trap Counter

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.