D/D Savant Copernicus

Fiend/Pendulum/Effect

Pendulum Effect: You cannot Pendulum Summon monsters, except "D/D" monsters. This effect cannot be negated. Once, while this card is in your Pendulum Zone, you can negate an activated Spell effect that would inflict damage to you, then destroy this card.
Monster Effect: If this card is Normal or Special Summoned: You can send 1 "D/D" or "Dark Contract" card from your Deck to the Graveyard, except "D/D Savant Copernicus". You can only use this effect of "D/D Savant Copernicus" once per turn.

D/D Savant Kepler

Fiend/Pendulum/Effect

Pendulum Effect: You cannot Pendulum Summon monsters, except "D/D" monsters. This effect cannot be negated. Once per turn, during your Standby Phase: Reduce this card's Pendulum Scale by 2 (min. 1), then destroy all monsters you control with a Level greater than or equal to this card's Pendulum Scale, except "D/D" monsters.
Monster Effect: If this card is Normal or Special Summoned: You can activate 1 of these effects. You can only use this effect of "D/D Savant Kepler" once per turn.
- Target 1 other "D/D" card you control; return it to the hand.
- Add 1 "Dark Contract" card from your Deck to your hand.

D/D Gryphon

Fiend/Pendulum/Effect

Pendulum Effect
You can target 1 Fiend monster you control; it gains 500 ATK (until the end of this turn) for each "Dark Contract" Spell/Trap with different names currently on your field or in your GY, then destroy this card. You can only use this effect of "D/D Gryphon" once per turn.
Monster Effect
If you control a "D/D" monster: You can Special Summon this card from your hand in Defense Position. If this card is Pendulum Summoned: You can discard 1 "D/D" or "Dark Contract" card; draw 1 card. If this card is Special Summoned from the GY: You can add 1 "D/D" card from your Deck to your hand, except "D/D Gryphon". You can only use each effect of "D/D Gryphon" once per turn.

D/D Necro Slime

Fiend/Effect

If this card is in your Graveyard: You can Fusion Summon 1 "D/D/D" Fusion Monster from your Extra Deck, by banishing Fusion Materials listed on it from your Graveyard, including this card. You can only use this effect of "D/D Necro Slime" once per turn.

D/D Swirl Slime

Fiend/Effect

If this card is in your hand: You can Fusion Summon 1 "D/D/D" Fusion Monster from your Extra Deck, using monsters from your hand as Fusion Materials, including this card. You can banish this card from your Graveyard; Special Summon 1 "D/D" monster from your hand. You can only use each effect of "D/D Swirl Slime" once per turn.

D/D Orthros

Fiend/Pendulum/Tuner/Effect

Pendulum Effect: Once per turn: You can target 1 Spell/Trap Card on the field and 1 other "D/D" or "Dark Contract" card you control; destroy them.
Monster Effect: When you take battle or effect damage: You can Special Summon this card from your hand. If this card is Special Summoned to your field, you cannot Special Summon monsters for the rest of this turn, except Fiend-Type monsters.

D/D Cerberus

Fiend/Pendulum/Effect

Pendulum Effect: Once per turn: You can target 1 "D/D" monster you control; change its Level to 4, and if you do, it gains 400 ATK and DEF (even if this card leaves the field).
Monster Effect: When this card is Pendulum Summoned from the hand, while you control a "D/D" monster other than "D/D Cerberus": You can target 1 Continuous Spell Card in your Graveyard; add it to your hand.

Berfomet

Fiend/Effect

When this card is Normal or Flip Summoned: You can add 1 "Gazelle the King of Mythical Beasts" from your Deck to your hand.

Forbidden Chalice

Target 1 face-up monster on the field; until the end of this turn, that target gains 400 ATK, but its effects are negated.

D/D Ghost

Fiend/Tuner/Effect

If this card is sent to the Graveyard: You can target 1 "D/D" monster or "Dark Contract" card in your Graveyard, except "D/D Ghost"; send 1 card from your Deck to the Graveyard with that name. If this card is banished: You can target 1 of your banished "D/D" monsters or "Dark Contract" cards, except "D/D Ghost"; return it to the Graveyard.

D/D Savant Thomas

Fiend/Pendulum/Effect

Pendulum Effect : During your Main Phase: You can add 1 face-up "D/D" Pendulum Monster from your Extra Deck to your hand. You can only use this effect of "D/D Savant Thomas" once per turn.
Monster Effect : You can target 1 "D/D" card in your Pendulum Zone; destroy that card, and if you do, Special Summon 1 Level 8 "D/D/D" monster from your Deck in Defense Position, but for the rest of this turn, its effects (if any) are negated, and any battle damage your opponent takes becomes halved. You can only use this effect of "D/D Savant Thomas" once per turn.

Go! - D/D/D Divine Zero King Rage

Fiend/Pendulum/Effect

Pendulum Effect: If you would take effect damage, you take no damage. If you Normal Summon 1 Level 5 or higher "D/D" monster, you can do it without Tributing. You can only use each Pendulum Effect of "Go! - D/D/D Divine Zero King Rage" once per turn.
Monster Effect: When this card declares an attack, if your opponent's LP is 4000 or less: You can make this card gain ATK equal to your opponent's LP, until the end of this turn. Cannot be destroyed by battle, also you take no damage from battles involving this card. You can Tribute 1 other monster; apply 1 of these effects until the end of this turn.
• This card can attack directly.
• Your opponent cannot activate cards or effects in the Spell & Trap Zones.
• Your opponent cannot activate card effects in their hand or GY.

Dark Contract with the Gate

During your Main Phase: You can add 1 "D/D" monster from your Deck to your hand. You can only use this effect of "Dark Contract with the Gate" once per turn. Once per turn, during your Standby Phase: Take 1000 damage.

Dark Contract with Patent License

If your opponent Special Summons a monster(s) with the same card type (Fusion, Synchro, Xyz, or Link) as a "D/D/D" monster you control (except during the Damage Step): You can inflict 1000 damage to your opponent, also, while this card is on the field, your opponent cannot Special Summon monsters with the same card type as that Special Summoned monster for the rest of this turn. If this card is sent to the GY: You can add 1 "D/D" monster from your GY, or 1 face-up "D/D" Pendulum Monster from your Extra Deck, to your hand. You can only use this effect of "Dark Contract with Patent License" once per turn.

D/D/D Headhunt

If you control a "D/D/D" monster: Target 1 face-up monster your opponent controls; take control of it until the End Phase of the next turn, but its effects are negated, it cannot declare an attack, also if it is a monster Special Summoned from the Extra Deck, it is also treated as a "D/D/D" monster. You can only activate 1 "D/D/D Headhunt" per turn.

D/D Vice Typhon

Fiend/Effect

When this card is Normal Summoned: You can Tribute 1 "D/D" monster; Special Summon 1 Level 7 "D/D/D" monster from your Deck. During your Main Phase, if this card is in the GY because it was sent there this turn: You can Fusion Summon 1 Level 8 or higher "D/D/D" Fusion Monster from your Extra Deck, by banishing Fusion Materials listed on it from your GY, including this card. You can only use each effect of "D/D Vice Typhon" once per turn.

Mirror Force

When an opponent's monster declares an attack: Destroy all Attack Position monsters your opponent controls.

Abyss Prop - Wild Wagon

The first time each "Abyss Actor" monster you control would be destroyed by battle each turn, it is not destroyed. Once per turn: You can target 1 "Abyss Actor" monster you control; your opponent cannot target it with card effects until the end of their turn (even if this card leaves the field). If this Set card in its owner's control is destroyed by an opponent's card effect, and you have a face-up "Abyss Actor" Pendulum Monster in your Extra Deck: You can return all cards your opponent controls to the hand.

Aeropixthree

Fairy/Tuner/Effect

Once per turn (Quick Effect): You can target 1 face-up monster your opponent controls in this card's column; move this card you control to another of your Main Monster Zones, and if you do, move that opponent's monster to their Main Monster Zone in this card's column, then place 1 Burnup Counter on it. (Monsters with Burnup Counters lose 200 ATK/DEF for each Burnup Counter on it.)

Amores of Prophecy

Spellcaster/Effect

Once per turn: You can reveal 1 "Spellbook" Spell Card in your hand; Special Summon 1 Level 4 or lower Spellcaster-Type monster from your hand.

D/D/D Abyss King Gilgamesh

Fiend/Link/Effect

2 "D/D" monsters
If this card is Special Summoned: You can activate this effect; you cannot Special Summon monsters for the rest of this turn, except "D/D" monsters, also place 2 "D/D" Pendulum Monsters with different names from your Deck in your Pendulum Zones, and if you do, take 1000 damage. If this Link Summoned card is destroyed by battle with an opponent's attacking monster, or by an opponent's card effect while in its owner's Monster Zone: You can Special Summon 1 "D/D" monster from your Extra Deck or GY in Defense Position. You can only use each effect of "D/D/D Abyss King Gilgamesh" once per turn.

D/D/D Duo-Dawn King Kali Yuga

Fiend/Xyz/Effect

2 Level 8 "D/D" monsters
After this card is Xyz Summoned, for the rest of this turn, other cards and their effects cannot be activated on the field, and other cards' effects on the field are negated. Once per turn, during either player's turn: You can detach 1 Xyz Material from this card; destroy all Spell and Trap Cards on the field. You can detach 1 Xyz Material from this card, then target 1 "Dark Contract" Spell/Trap Card in your Graveyard; Set that target.

D/D/D Deviser King Deus Machinex

Fiend/Xyz/Pendulum/Effect

Pendulum Effect
While you have a card in your other Pendulum Zone: You can target 1 Pendulum Monster you control or in your GY; Special Summon the card in your other Pendulum Zone, and if you do, place that targeted Pendulum Monster in your Pendulum Zone. You can only use this effect of "D/D/D Deviser King Deus Machinex" once per turn.
Monster Effect
2 Level 10 Fiend monsters
You can also Xyz Summon this card by using a "D/D/D" monster you control as material. (Transfer its materials to this card.) You can only control 1 "D/D/D Deviser King Deus Machinex" in your Monster Zone. Once per Chain, when a Monster Card your opponent controls activates its effect (Quick Effect): You can either detach 2 materials from this card, or destroy 1 "Dark Contract" card you control, and if you do, attach that opponent's card to this card as material. Once per turn, during your Standby Phase: You can place this card in your Pendulum Zone.

D/D/D Marksman King Tell

Fiend/Xyz/Effect

2 Level 5 monsters
You can also Xyz Summon this card by using a Rank 4 "D/D/D" Xyz Monster you control as the Xyz Material. (Xyz Materials attached to that monster also become Xyz Materials on this card.) Once per turn, during either player's turn, if you took any effect damage this turn: You can detach 1 Xyz Material from this card, then target 1 face-up monster on the field; it loses 1000 ATK and DEF, and if it does, inflict 1000 damage to your opponent. If this card is sent from the field to the Graveyard: You can send 1 "D/D" or "Dark Contract" card from your Deck to the Graveyard.

D/D/D Flame High King Genghis

Fiend/Fusion/Effect

If another "D/D" monster(s) is Normal or Special Summoned to your field, while you control this face-up card (except during the Damage Step): You can target 1 "D/D" monster in your Graveyard; Special Summon it. You can only use this effect of "D/D/D Flame High King Executive Genghis" once per turn. Once per turn, during your turn, when a Spell/Trap Card or effect is activated: You can negate the activation (this is a Quick Effect).

D/D/D Flame King Genghis

Fiend/Fusion/Effect

2 "D/D" monsters
If another "D/D" monster(s) is Special Summoned to your field, while you control this face-up card (except during the Damage Step): You can target 1 "D/D" monster in your Graveyard; Special Summon it. You can only use this effect of "D/D/D Flame King Genghis" once per turn. 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 target 1 "Dark Contract" card in your Graveyard; add it to your hand.

D/D/D Super Doom King Purple Armageddon

Fiend/Fusion/Pendulum/Effect

Pendulum Effect :Once per turn, if your "D/D/D" Fusion Monster battles an opponent's monster, before damage calculation: You can make that opponent's monster lose 1000 ATK until the end of this turn (even if this card leaves the field).
Monster Effect : 2 "D/D/D" monsters
You can target 1 Attack Position monster your opponent controls; destroy it, and if you do, inflict damage to your opponent equal to half the destroyed monster's original ATK. You can only use this effect of "D/D/D Super Doom King Purplish Armageddon" once per turn. If an opponent's monster battles, before damage calculation: You can make the ATK of that opponent's monster become equal to its original ATK until the end of the Damage Step. If this card in the Monster Zone is destroyed: You can place this card in your Pendulum Zone.