Fiend / Fusion / Effect

1 Level 5 or higher "D/D" monster + 1 "D/D" monster

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

Fiend / Fusion / Effect

2 "D/D" monsters

If another "D/D" monster(s) is Special Summoned to your field, while you control this monster (except during the Damage Step): You can target 1 "D/D" monster in your GY; 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 GY; add it to your hand.

Fiend / Synchro / Effect

1 Tuner + 1+ non-Tuner monsters

If 3 or more "D/D/D" monsters are on the field, this card gains 3000 ATK. If another "D/D" monster(s) is Normal or Special Summoned to your field while this monster is on the field (except during the Damage Step): You can target 1 "D/D" monster in your GY; Special Summon it. You can only use this effect of "D/D/D Gust High King Alexander" once per turn.

Fiend / Synchro / Effect

1 "D/D" Tuner + 1 or more non-Tuner monsters

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 Level 4 or lower "D/D" monster in your Graveyard; Special Summon it. You can only use this effect of "D/D/D Gust King Alexander" once per turn.

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.

Shuffle 3 cards into the Deck (any combination of "D/D" monsters in your hand, field, or Graveyard, and/or "D/D" cards in your Pendulum Zone), then you can add 2 "D/D" monsters from your Deck to your hand.

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.

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.

Fiend / Fusion / Effect

2 "D/D" monsters

Any effect that would inflict damage to you makes you gain that much LP, instead.

Fiend / Pendulum / Effect

Pendulum Effect: When you take effect damage (except during the Damage Step): You can destroy this card, and if you do, any effect that would inflict damage to a player this turn increases their LP by the same amount, instead.

Monster Effect: When you take effect damage (except during the Damage Step): You can Special Summon this card from your hand, and if you do, gain LP equal to the damage you took. You take no effect damage.

Fiend / Xyz / Effect

2 Level 3 Fiend-Type monsters

Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, then target 1 "Dark Contract" card you control; destroy it, and if you do, draw 1 card. If this card battles an opponent's monster, during damage calculation: You can detach 1 Xyz Material from this card; make this card unable to be destroyed by that battle, destroy the opponent's monster that battled it after damage calculation, and if you do, inflict 500 damage to your opponent.

Fiend / Synchro / Pendulum / Effect

Pendulum Effect: Once per turn, when an opponent's monster declares an attack: You can target 1 "D/D/D" Synchro Monster you control; destroy as many monsters your opponent controls as possible with DEF less than or equal to the targeted monster's ATK, and if you do, inflict 1000 damage to your opponent for each monster destroyed.

Monster Effect: 1 "D/D" Tuner + 1+ non-Tuner "D/D/D" monsters

Your opponent cannot target monsters you control with card effects. If another monster is Normal or Special Summoned while this monster is on the field (except during the Damage Step): You can make your opponent choose 1 Pendulum Monster they control, and all other monsters they currently control have their effects negated. If this card in the Monster Zone is destroyed: You can place this card in your Pendulum Zone.

Fiend / Xyz / Pendulum / Effect

Pendulum Effect: Once per turn, if you have a "D/D" card in your other Pendulum Zone: You can Special Summon 1 "D/D/D" Xyz Monster from your Extra Deck, except "D/D/D Super Doom King Dark Armageddon".

Monster Effect: 2 Level 8 "D/D/D" monsters

Cannot be Pendulum Summoned. When this card is Xyz Summoned: You can attach 1 face-up "D/D" Pendulum Monster from your Extra Deck to this card as material. Pendulum Monsters you control cannot be destroyed by card effects. Once per turn: You can detach 1 material from this card, then target monsters your opponent controls, equal to the number of Pendulum Monsters you control; destroy them. If this card in the Monster Zone is destroyed: You can place this card in your Pendulum Zone.

Fiend / Fusion / Pendulum / Effect

Pendulum Effect: Once per turn, before damage calculation, if your "D/D/D" Fusion Monster battles an opponent's monster: 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 its original ATK. You can only use this effect of "D/D/D Super Doom King Purple Armageddon" once per turn. Before damage calculation, if an opponent's monster battles: You can make its ATK 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.

Fiend / Pendulum / Effect

Pendulum Effect: You can target 1 face-up monster on the field; its DEF becomes 0 until the end of this turn (even if this card leaves the field). You can only use this effect of "D/D/D Supersight King Zero Maxwell" once per turn.

Monster Effect: Before damage calculation, if this card attacks an opponent's Defense Position monster: You can change the DEF of that opponent's monster to 0 until the end of the Damage Step. If this card attacks a Defense Position monster, inflict piercing battle damage. You take no battle damage from battles involving this card.

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 destroyed card, this card gains 1 additional attack during each Battle Phase this turn.

Fiend / Pendulum / Effect

Pendulum Effect: You can target any number of "Dark Contract" cards you control; destroy them, and if you do, Special Summon this card from your Pendulum Zone, then you can increase or decrease its Level by the number destroyed. You can only use this effect of "D/D/D Vice King Requiem" once per turn.

Monster Effect: You cannot Special Summon monsters, except "D/D/D" monsters. A "D/D/D" monster that was Fusion, Synchro, Xyz, or Link Summoned using this card on the field as material gains this effect.

● Once per turn: You can target 1 card on the field; shuffle 1 "Dark Contract" card from your field or GY into the Deck, and if you do, destroy that target, then gain 1000 LP.

You can only use this effect of "D/D/D Vice King Requiem" once per turn.

Fiend / Xyz / Effect

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.

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.

Fiend / Fusion / Effect

2 "D/D/D" monsters

Once per turn, when an attack is declared involving this card: You can target 1 other "D/D" or "Dark Contract" card you control; return it to the hand, and if you do, equip 1 face-up monster your opponent controls to this card, except the battling monster. This card gains ATK equal to the combined original ATK of the monsters equipped to it by this effect.

Fiend / Pendulum / Effect

Pendulum Effect: You can target 1 card in your opponent's Pendulum Zone; Special Summon this card, and if you do, place that card in your Pendulum Zone, but destroy it during the End Phase of the next turn. You can only use this effect of "D/D/D/D Super-Dimensional Sovereign Emperor Zero Paradox" once per turn.

Monster Effect: Cannot be Normal Summoned/Set. Must be Special Summoned by its own effect. When you Pendulum Summon a monster(s), while the total Pendulum Scales in your Pendulum Zones are higher than the total Levels of the Pendulum Summoned monsters: You can Special Summon this card from your hand, and if you do, destroy as many other cards on the field as possible, then you can place this card in your Pendulum Zone. Once per turn, if another face-up "D/D/D" monster(s) you control leaves the field by Spell Card or effect: This card's ATK becomes 6000.

Select 1 face-up Defense Position monster you control. Its DEF becomes double its original DEF.

Dragon / Effect

Once per turn: You can target 1 Level 4 or lower Dragon monster in your GY and 1 Dragon monster you control; equip that monster in your GY to that monster on the field as an Equip Spell that makes it gain 500 ATK. At the end of the Damage Step, if your monster equipped with an Equip Card attacked: You can banish this card from your GY; destroy as many cards as possible equipped to that monster you control, and if you do, that monster can make a second attack in a row.

Select 1 face-down monster you control. Your opponent declares 2 Attributes. Reveal the selected monster. If its Attribute is one of the declared Attributes, your opponent draws 2 cards. If not, you draw 2 cards.

Activate this card by declaring 1 Monster Type. All face-up monsters on the field become that Type.