DARK mill

Dark Velgr
Level 4 DARK Winged Beast/Effect
1300/1000
[REQUIREMENT] Send 1 Level 4 or lower monster from your hand to the Graveyard.
[EFFECT] Send cards from each player's Deck to the Graveyard equal to [the Level of the monster sent to the Graveyard to meet the requirement].

Stygian Harpy
Level 4 DARK Winged Beast/Effect
1300/0
[REQUIREMENT] None
[EFFECT] Detach 1 material from 1 Xyz Monster on your field. Then, if you detached a material by this effect, draw 1 card.

Wispering Willo
Level 2 DARK Zombie/Effect
300/600
[REQUIREMENT] None
[EFFECT] Increase this card's Level by 1 or 2 until the end of this turn.

Shadow Diviner
Level 4 DARK Spellcaster/Effect
1200/800
[REQUIREMENT] None
[EFFECT] Detach 1 material from 1 Xyz Monster on your field. Then, if you detached a material by this effect, send the top 3 cards of your opponent's Deck to the Graveyard.

Umbra Fox
Level 1 DARK Beast/Effect
300/200
[REQUIREMENT] During the turn you Normal Summoned this card, change its battle position (Attack Position becomes face-up Defense Position, Defense Position becomes face-up Attack Position).
[EFFECT] Send the top 2 cards of your opponent's Deck to the Graveyard.

Black Knight
Level 4 DARK Warrior/Effect
1400/1000
[REQUIREMENT] Shuffle 2 DARK Attribute monsters with different Types from your Graveyard into the Deck.
[EFFECT] Choose 1 face-up Xyz Monster on your field. If it attacks a Defense Position monster this turn, inflict piercing battle damage (if the ATK of the attacking monster exceeds the DEF of the attack target, inflict the difference).

Moon Rabbit
Level 2 DARK Beast-Warrior/Effect
800/100
[REQUIREMENT] You Normal Summoned this card this turn and have no other monsters on your field.
[EFFECT] Send the top 2 cards of your opponent's Deck to the Graveyard. Then, increase this card's Level by 2, until the end of this turn.

Chaos Rogue
Level 4 DARK Fiend/Effect
1200/600
[REQUIREMENT] During the turn you Normal Summoned this card.
[EFFECT] Send the top card of your Deck to the Graveyard. Then, if you sent a Level 4 or lower DARK Attribute monster to the Graveyard by this effect, you can send cards from the top of your opponent's Deck to the Graveyard equal to [the Level of the monster sent to the Graveyard by this effect].

Ghost Chandelier
Level 4 DARK Zombie/Effect
1300/800
[REQUIREMENT] During the turn you Normal Summoned this card.
[EFFECT] Set 1 "Deck Destruction" from your Graveyard in your Spell & Trap Zone.

Yokai Maid
Level 4 DARK Spellcaster/Effect
1000/1000
[REQUIREMENT] Send this face-up card from your field to the Graveyard.
[EFFECT] Send the top 2 cards of your opponent's Deck to the Graveyard.

Phantomisty
Level 3 DARK Fiend/Effect
1100/600
[REQUIREMENT] You Normal Summoned this card this turn and have no other monsters on your field.
[EFFECT] Return 1 Xyz Monster from your Graveyard to the Extra Deck. This card's Level becomes equal to [the Rank of the monster returned by this effect] until the end of this turn.

Broken Swordsman
Rank 3 DARK Warrior/Xyz/Effect
1800/1200
2 Level 3 DARK Attribute monsters
[REQUIREMENT] Detach 1 material from this card.
[EFFECT] This card loses 500 ATK until the end of this turn. This turn, this card can attack directly.

Masquerade Dragon
Rank 4 DARK Dragon/Xyz/Effect
2500/2000
2 Level 4 DARK Attribute monsters
[REQUIREMENT] Detach 1 material from this card.
[EFFECT] Send cards from the top of your opponent's Deck to the Graveyard equal to [the number of DARK Attribute monsters in your Graveyard].

Rebellious Requiem
Spell Card
[REQUIREMENT] You have "Masquerade Dragon" face-up on your field.
[EFFECT] Destroy 1 monster on your opponent's field.

Edge of Chaos
Spell Card
[REQUIREMENT] Shuffle 1 Level 4 or lower DARK Attribute monster from your Graveyard into the Deck.
[EFFECT] Send cards from your opponent's Deck to the Graveyard equal to [the Level of the shuffled monster].

Time Control
Spell Card
[REQUIREMENT] Detach 1 material from a DARK Attribute Xyz Monster on your field.
[EFFECT] Until the end of the opponent's next turn, while this card is face-up, neither player can Special Summon monsters from the Graveyard.

Psychic Tornado
Spell Card
[REQUIREMENT] You have "Masquerade Dragon" face-up on your field.
[EFFECT] Destroy 1 Spell/Trap Card on your opponent's field.

Xyz Stadium
Field Spell Card
[REQUIREMENT] None
[EFFECT] While this card is face-up in the Field Zone, face-up Xyz Monsters on the field cannot be destroyed by Trap Card effects.

Deck Destruction
Trap Card
[REQUIREMENT] When your opponent Normal or Special Summons a Level 7 or higher monster face-up.
[EFFECT] Send the top 3 cards of your opponent's Deck to the Graveyard. The Summoned monster loses 1000 ATK until the end of this turn.

Infernal Return
Trap Card
[REQUIREMENT] When a card is sent from your opponent's Deck to the Graveyard.
[EFFECT] Inflict 100 damage to your opponent [for each card in your opponent's Graveyard].

Genocidal Campaign
Trap Card
[REQUIREMENT] When a card is sent from your opponent's Deck to the Graveyard.
[EFFECT] Destroy 1 face-up Level 7 or lower monster on your opponent's field.

Linking Rings of the Dragon
Trap Card
[REQUIREMENT] When a card is sent from your opponent's Deck to the Graveyard.
[EFFECT] 1 face-up Xyz Monster on your field gains 100 ATK [for each card in your opponent's Graveyard] until the end of this turn.

Overlay Punishment
Trap Card
[REQUIREMENT] When a card is sent from your opponent's Deck to the Graveyard, detach 1 material from 1 Xyz Monster on your field.
[EFFECT] Send cards from the top of your opponent's Deck to the Graveyard equal to [that Xyz Monster's Rank].