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.

DARK 101

[ Pendulum Effect ] During your Main Phase: You can add 1 face-up "D/D/D" Pendulum Monster from your Extra Deck to your hand, except "D/D/D Destiny King Zero Laplace". You can only use this effect of "D/D/D Destiny King Zero Laplace" once per turn. [ Monster Effect ] You can Special Summon this card (from your hand) by Tributing 1 "D/D/D" monster. Before damage calculation, if this card battles an opponent's monster: You can activate this effect; this card's ATK becomes double that opponent's monster's original ATK until the end of the Damage Step. If this card attacks a Defense Position monster, inflict piercing battle damage. The first time this card would be destroyed by battle each turn, it is not destroyed, and you take no battle damage from that battle.

FIRE 6

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.

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.

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 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.

Trap Continuous

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 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.

DARK 84

[ 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 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.

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 6

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.

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.

DARK 84

[ 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 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.