D/D/D Chaos King Apocalypse

Fiend/Pendulum/Effect

Pendulum Effect: You can banish 2 "D/D" monsters from your Graveyard; Special Summon this card from your Pendulum Zone.
Monster Effect: During your opponent's turn, if this card is in your hand or Graveyard: You can target 2 face-up Spell/Trap Cards you control; you cannot Special Summon monsters for the rest of this turn, except Fiend-Type monsters, also destroy the targeted cards, and if you do, Special Summon this card (this is a Quick Effect). You can only use this effect of "D/D/D Chaos King Apocalypse" once per turn.

D/D/D Oblivion King Abyss Ragnarok

Fiend/Pendulum/Effect

Pendulum Effect : If you Special Summon a "D/D" monster(s), except during the Damage Step: You can target 1 "D/D" monster in your Graveyard; any battle damage your opponent takes becomes halved for the rest of this turn, also Special Summon that monster, and if you do, take 1000 damage. You can only use this effect of "D/D/D Oblivion King Abyss Ragnarok" once per turn.
Monster Effect : If this card is Normal or Special Summoned: You can target 1 "D/D/D" monster in your Graveyard; Special Summon it. You can only use this effect of "D/D/D Oblivion King Abyss Ragnarok" once per turn. Once per turn: You can Tribute 1 other "D/D" monster, then target 1 monster your opponent controls; banish it.

D/D/D Supreme King Kaiser

Fiend/Effect

If this card is Pendulum Summoned: All face-up cards your opponent currently controls have their effects negated, until the end of this turn. Once per turn, during your Main Phase, if this card was Pendulum Summoned this turn: You can target up to 2 cards in your Spell & Trap Zones; destroy them, and if you do, for each card destroyed, this card gains 1 additional attack during each Battle Phase this turn.

D/D/D Doom King Armageddon

Fiend/Pendulum/Effect

Pendulum Effect: Once per turn: You can target 1 "D/D" monster you control; it gains 800 ATK until the end of this turn (even if this card leaves the field).
Monster Effect: Once per turn, if a monster(s) you control is destroyed by battle or by card effect: You can target 1 of those monsters; this card gains ATK equal to that monster's original ATK until the end of this turn. This card cannot attack your opponent directly during the turn this effect is activated. Cannot be destroyed by Spell/Trap effects that do not target this card.

D/D Lamia

Fiend/Tuner/Effect

If this card is in your hand or Graveyard: You can send 1 "D/D" or "Dark Contract" card from your hand or face-up from your field to the Graveyard, except "D/D Lamia"; Special Summon this card, but banish it when it leaves the field. You can only use this effect of "D/D Lamia" 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 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 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 Nighthowl

Fiend/Tuner/Effect

When this card is Normal Summoned: You can target 1 "D/D" monster in your Graveyard; Special Summon it, also you cannot Special Summon monsters for the rest of this turn, except Fiend-Type monsters. That monster's ATK and DEF become 0. If it is destroyed, you take 1000 damage.

D/D Savant Newton

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 Trap effect that would inflict damage to you, then destroy this card.
Monster Effect: You can discard this card, then target 1 "D/D" or "Dark Contract" card in your Graveyard, except "D/D Savant Newton"; add it to your hand. You can only use this effect of "D/D Savant Newton" once per turn.

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.

Legendary Maju Garzett

Fiend/Effect

Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by Tributing all monsters you control. This card's ATK becomes the combined original ATK of the Tributed monsters. If this card attacks a Defense Position monster, inflict piercing battle damage.

Foolish Burial

Send 1 monster from your Deck to the Graveyard.

Dark Eruption

Target 1 DARK monster with 1500 or less ATK in your Graveyard; add that target to your hand.

Dark Contract with the Yamimakai

Once per turn, during your Standby Phase: Take 1000 damage.
You can only use 1 of the following effects of "Dark Contract with the Yamimakai" per turn, and only once that turn.
- During your Main Phase: You can target 1 "D/D" Pendulum Monster in your Graveyard; place it in your Pendulum Zone.
- During your Main Phase: You can place 1 face-up "D/D" Pendulum Monster from your Extra Deck in your Pendulum Zone.

One for One

Send 1 monster from your hand to the GY; Special Summon 1 Level 1 monster from your hand or Deck.

Allure of Darkness

Draw 2 cards, then banish 1 DARK monster from your hand, or, if you do not have any in your hand, send your entire hand to the 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 the Swamp King

During your Main Phase: You can Fusion Summon 1 Fiend-Type Fusion Monster from your Extra Deck, using monsters from your hand or your side of the field as Fusion Materials. You can only use this effect of "Dark Contract with the Swamp King" once per turn. If Summoning a "D/D" Fusion Monster this way, you can also banish monsters from your Graveyard as Fusion Material. Once per turn, during your Standby Phase: Take 1000 damage.

Dark Contract with the Witch

You can send 1 "D/D" or "Dark Contract" card from your hand to the Graveyard, then target 1 card on the field; destroy it. You can only use this effect of "Dark Contract with the Witch" once per turn. All Fiend-Type monsters you control gain 1000 ATK during your opponent's turn only. Once per turn, during your Standby Phase: Take 1000 damage.

Dark Contract with Errors

Once per turn, if you control a "D/D" monster: You can negate all Trap Card effects on the field (other than this card's) for the rest of this turn (even if this card leaves the field). Once per turn, during your Standby Phase: Take 1000 damage.

Contract Laundering

Destroy as many "Dark Contract" cards in your Spell & Trap Zone as possible, and if you do, draw the same number of cards you destroyed, then gain 1000 LP for each card you drew with this effect.

D/D/D Dragonbane King Beowulf

Fiend/Fusion/Effect

1 "D/D/D" monster + 1 "D/D" monster

If a "D/D" monster you control attacks a Defense Position monster, inflict piercing battle damage to your opponent. Once per turn, during your Standby Phase: You can destroy all cards in the Spell & Trap Zones.

D/D/D Cursed King Siegfried

Fiend/Synchro/Effect

1 Tuner + 1 or more non-Tuner "D/D" monsters
During either player's turn: You can target 1 face-up Spell/Trap Card on the field; that target has its effects negated, until the next Standby Phase. You can only use this effect of "D/D/D Cursed King Siegfried" once per turn. If this card is destroyed by battle or card effect and sent to the Graveyard: Gain 1000 LP for each "Dark Contract" card you control.

D/D/D Wave King Caesar

Fiend/Xyz/Effect

2 Level 4 Fiend-Type monsters
During either player's turn: You can detach 1 Xyz Material from this card; at the end of the Battle Phase, Special Summon from your Graveyard as many monsters destroyed this turn as possible, but during the next Standby Phase, take 1000 damage for each monster Special Summoned by this effect. If this card is sent from the field to the Graveyard: You can add 1 "Dark Contract" card from your Deck to your hand. You can only use each effect of "D/D/D Wave King Caesar" once per turn.

Barricadeborg Blocker

Machine/Link/Effect

2 monsters with different names
If this card is Link Summoned: You can discard 1 card; during the End Phase of this turn, add 1 Continuous or Field Spell from your GY to your hand. You can only use this effect of "Barricadeborg Blocker" once per turn. Face-up Spells you control cannot be destroyed by your opponent's card effects.

Pentestag

Cyberse/Link/Effect

2 Effect Monsters
If your linked monster attacks a Defense Position monster, inflict piercing battle damage to your opponent.

Linkuriboh

Cyberse/Link/Effect

1 Level 1 Monster
When an opponent's monster declares an attack: You can Tribute this card; change that opponent's monster's ATK to 0, until the end of this turn. If this card is in your GY (Quick Effect): You can Tribute 1 Level 1 monster; Special Summon this card. You can only use this effect of "Linkuriboh" once per turn.

Decode Talker

Cyberse/Link/Effect

2+ Effect Monsters
Gains 500 ATK for each monster it points to. When your opponent activates a card or effect that targets a card(s) you control (Quick Effect): You can Tribute 1 monster this card points to; negate the activation, and if you do, destroy that card.