Gates of the Underworld Structure Deck

Draw 2 cards, then banish 1 DARK monster from your hand, or, if you do not have any in your hand, send your entire hand to the GY.

Allure of Darkness

When an opponent's monster declares a direct attack: You can Special Summon this card from your hand, then end the Battle Phase. If Summoned this way, banish it when it leaves the field.

Battle Fader

If this card is discarded to the Graveyard by a card effect: Special Summon it from the Graveyard.

Beiige, Vanguard of Dark World

Your opponent cannot target any face-up monster you control, except "Belial - Marquis of Darkness", for an attack, or with Spell/Trap effects.

Belial - Marquis of Darkness

If this card is discarded to the Graveyard by a card effect: Draw 1 card, plus another card if this card was discarded from your hand to your Graveyard by an opponent's card effect.

Broww, Huntsman of Dark World

When this card inflicts battle damage to your opponent: You can discard 1 card.

Brron, Mad King of Dark World

Both players discard as many cards as possible from their hands, then each player draws the same number of cards they discarded.

Card Destruction

If this card is Normal or Special Summoned: Place 1 Guard Counter on it. This card gains 300 ATK for each Guard Counter on it. Once per turn: You can target 1 other face-up card you control; remove 1 Guard Counter from this card, and if you do, place 1 Guard Counter on that target (if that card would ever be destroyed, remove 1 Guard Counter from it instead).

Card Guard

If this card is discarded to the Graveyard by a card effect: Special Summon this card from the Graveyard to your opponent's side of the field in face-up Defense Position. When this card is Special Summoned by the effect of a "Dark World" card: Your opponent must discard 1 card.

Ceruli, Guru of Dark World

When your opponent activates a Spell/Trap Card: Your opponent draws 1 card, also negate the Spell/Trap activation, and if you do, destroy it.

Dark Bribe

When your opponent activates a Normal Spell Card: Pay 1000 Life Points; the effect of that Normal Spell Card becomes "Your opponent discards 1 random card".

Dark Deal

Target 1 DARK monster with 1500 or less ATK in your GY; add that target to your hand.

Dark Eruption

Your opponent can discard 1 card to negate this card's effect, otherwise both players discard 2 cards, then draw 2 cards.

Dark Scheme

Each player draws 1 card, then each player discards 1 card.

Dark World Dealings

Target 1 Set card on the field; destroy that target, then discard 1 card.

Dark World Lightning

Tribute 1 DARK monster with 2000 or more ATK; look at your opponent's hand, all monsters they control, and all cards they draw until the end of their 3rd turn after this card's activation, and destroy all those monsters with 1500 or less ATK.

Deck Devastation Virus

Tribute 1 DARK monster with 2500 or more ATK, and declare 1 type of card (Spell or Trap); look at your opponent's hand, all Spells/Traps they control, and all cards they draw until the end of their 3rd turn after this card's activation, and destroy all cards of that declared type.

Eradicator Epidemic Virus

Target 1 of your banished DARK monsters; Special Summon that target. When this card leaves the field, destroy that target, and if you do, banish it. When that target is destroyed, destroy this card.

Escape from the Dark Dimension

Target 1 "Dark World" monster in your Graveyard; Special Summon that target. You cannot Summon other monsters the turn you activate this card (but you can Set).

Gateway to Dark World

While you control another Fiend-Type monster, this card cannot be attacked. The ATK and DEF of this card are each equal to the number of Fiend-Type monsters on the field (excluding this card) x 1000.

Goblin King

If this card is discarded to the Graveyard by a card effect: If it was discarded from your hand to your Graveyard by an opponent's card effect, you can target up to 2 cards your opponent controls; Special Summon this card from the Graveyard, then destroy those targets (if any).

Goldd, Wu-Lord of Dark World

You can Special Summon this card (from your Graveyard) by returning 1 "Dark World" monster you control to the hand, except "Grapha, Dragon Lord of Dark World". If this card is discarded to the Graveyard by a card effect: Target 1 card your opponent controls; destroy that target, then, if this card was discarded from your hand to your Graveyard by an opponent's card effect, look at 1 random card in your opponent's hand, then, if it was a monster, you can Special Summon it to your side of the field.

Grapha, Dragon Lord of Dark World

If this card is destroyed by battle and sent to the Graveyard: Target 1 card on the field; destroy that target.

Grave Squirmer

If this card is discarded to the Graveyard by a card effect: Target 1 Spell/Trap Card on the field; destroy that target.

Gren, Tactician of Dark World

If this card is discarded to the Graveyard by a card effect: Target 1 monster on the field; destroy that target.

Kahkki, Guerilla of Dark World

Declare 1 card name; if that card is in your opponent's hand, they must discard all copies of it, otherwise you discard 1 random card.

Mind Crush

If this card is destroyed by battle and sent to the GY: Target 1 monster on the field; destroy that target.

Newdoria

If this card is discarded from your hand to your Graveyard by an opponent's card effect: Special Summon this card from the Graveyard. When this card is Special Summoned this way: Destroy all monsters your opponent controls OR all Spell/Trap Cards they control.

Reign-Beaux, Overlord of Dark World

His renowned athletic physique has made him famous with the populace of Dark World. They call him "Iron Wall Renge" because no one can break through his incredible defenses.

Renge, Gatekeeper of Dark World

If this card is sent from the field to the GY: Add 1 monster with 1500 or less ATK from your Deck to your hand, but you cannot activate cards, or the effects of cards, with that name for the rest of this turn. You can only use this effect of "Sangan" once per turn.

Sangan

When this card is destroyed by battle and sent to the Graveyard: Add 1 Level 4 or lower "Dark World" monster from your Deck to your hand.

Scarr, Scout of Dark World

If this card is discarded to the Graveyard by a card effect: Special Summon it from the Graveyard, then, if this card was discarded from your hand to your Graveyard by an opponent's card effect, your opponent returns exactly 2 cards from their hand to the bottom of their Deck, in any order.

Sillva, Warlord of Dark World

If this card is discarded to the Graveyard by a card effect: If it was discarded from your hand to your Graveyard by an opponent's card effect, you can target 1 monster in your opponent's Graveyard; add 1 "Dark World" card from your Deck to your hand, then Special Summon that target (if any) in face-up Defense Position.

Snoww, Unlight of Dark World

Add 1 Field Spell from your Deck to your hand.

Terraforming

Target 2 "Dark World" monsters in your Graveyard; add those targets to your hand.

The Forces of Darkness

All Fiend-Type monsters gain 300 ATK and DEF. Once per turn: You can banish 1 Fiend-Type monster from your Graveyard; discard 1 Fiend-Type monster, then draw 1 card.

The Gates of Dark World

Target 2 cards in the GY(s); shuffle those targets into the Deck(s).

The Transmigration Prophecy

When you take battle damage: You can Special Summon this card from your hand. Gains 600 ATK/DEF for each card in your hand. Once per turn: You can send 1 monster from your hand to the GY, then target 1 face-up monster your opponent controls with the same Level the sent monster had in the hand; take control of that face-up monster. Once per turn: You can target 1 monster in your GY; this card's Level becomes the same as that target's, until the end of this turn.

Tragoedia

The name of this illustrious knight is known by all residents of Dark World. He never oppresses the commoners.