Spell Continuous

During your Main Phase: You can Fusion Summon 1 Fiend-Type Fusion Monster from your Extra Deck, using monsters from your hand or 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 7

If this card is in your hand: You can Tribute 1 Dragon-Type monster and 1 other Fiend-Type monster from your hand and/or your side of the field; Special Summon this card. Once per turn: You can discard 1 card; this card gains 500 ATK, then you can destroy 1 Spell/Trap Card on the field. This ATK increase lasts until the end of this turn.

DARK 74

[ 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.

WATER

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.

WIND 10

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.

DARK 2

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.

EARTH

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.

DARK 110

[ 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.

DARK 4

Once per turn: You can target 1 "D/D" monster you control that has a Level, except "D/D Berfomet", and declare a Level from 1 to 8; it becomes that Level until the end of this turn, also you cannot Special Summon monsters for the rest of this turn, except "D/D" monsters.

FIRE 8

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.

DARK 8

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.

DARK 7

2 "D/D" monsters Any effect that would inflict damage to you makes you gain that much LP, instead.

DARK 3

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.

DARK 10

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.

Spell Continuous

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.

Spell Quick

Target 1 face-up monster on the field; change that target to face-down Defense Position.

DARK 7

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.

DARK 43

[ 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.

DARK 2

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.

FIRE 8

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.

DARK 74

[ 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.

EARTH

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.

Spell Quick

Target 1 face-up monster on the field; change that target to face-down Defense Position.