D/D/D Alfred the Divine Sage King

2 "D/D" monsters
During your Main Phase: You can Fusion Summon 1 "D/D/D" Fusion Monster from your Extra Deck, by shuffling its materials from your hand, field and/or banishment into the Deck. If this card is banished: You can target "Dark Contract" Continuous Spells/Traps in your GY and/or banishment, up to the number of "D/D/D" monsters you control; place them face-up on your field. You can only use each effect of "D/D/D Alfred the Divine Sage King" once per turn.

D/D/D Dragonbane King Beowulf

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 Flame High King Genghis

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.

D/D/D Flame King Genghis

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 Oracle King d'Arc

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

D/D/D Super Doom King Purple Armageddon

[ 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).

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.

D/D/D Wave Oblivion King Caesar Ragnarok

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.

D/D/D/D Dimensional King Arc Crisis

[ Pendulum Effect ]
You can target any number of "Dark Contract" cards you control; destroy them, then you can Special Summon up to that many "Doom King" Pendulum Monsters from your Deck and/or Extra Deck. You can only use this effect of "D/D/D/D Dimensional King Arc Crisis" once per turn.

4 Fiend monsters (1 Fusion, 1 Synchro, 1 Xyz, and 1 Pendulum)
Must be either Fusion Summoned, or Special Summoned (from your face-down Extra Deck) by banishing the above cards from your field and/or GY. You can only Special Summon "D/D/D/D Dimensional King Arc Crisis" once per turn this way, no matter which method you use. If this card is Special Summoned: You can negate the effects of all face-up monsters your opponent currently controls. Can attack all your opponent's monsters, once each. If this card in the Monster Zone is destroyed: You can place this card in your Pendulum Zone.