Dark Ruler No More

Negate the effects of all face-up monsters your opponent currently controls, until the end of this turn, also, for the rest of this turn after this card resolves, your opponent takes no damage. Neither player can activate monster effects in response to this card's activation.

Nibiru, the Primal Being

Rock/Effect

During the Main Phase, if your opponent Normal or Special Summoned 5 or more monsters this turn (Quick Effect): You can Tribute as many face-up monsters on the field as possible, and if you do, Special Summon this card from your hand, then Special Summon 1 "Primal Being Token" (Rock/LIGHT/Level 11/ATK ?/DEF ?) to your opponent's field. (This Token's ATK/DEF become the combined original ATK/DEF of the Tributed monsters.) You can only use this effect of "Nibiru, the Primal Being" once per turn.

Ghost Ogre & Snow Rabbit

Psychic/Tuner/Effect

When a monster on the field activates its effect, or when a Spell/Trap that is already face-up on the field activates its effect (Quick Effect): You can send this card from your hand or field to the GY; destroy that card on the field. You can only use this effect of "Ghost Ogre & Snow Rabbit" once per turn.

Mind Control

Target 1 monster your opponent controls; until the End Phase, take control of that target, but it cannot declare an attack or be Tributed.

Evenly Matched

At the end of the Battle Phase, if your opponent controls more cards than you do: You can make your opponent banish cards from their field face-down so they control the same number of cards as you do. If you control no cards, you can activate this card from your hand.

Rivalry of Warlords

Each player can only control 1 Type of monster. Send all other face-up monsters they control to the Graveyard.

Effect Veiler

Spellcaster/Tuner/Effect

During your opponent's Main Phase (Quick Effect): You can send this card from your hand to the GY, then target 1 Effect Monster your opponent controls; negate the effects of that face-up monster your opponent controls, until the end of this turn.

Subterror Behemoth Umastryx

Reptile/Flip/Effect

FLIP: You can target 1 monster your opponent controls; banish it. You can only use this effect of "Subterror Behemoth Umastryx" once per turn. When a face-up monster you control is flipped face-down, if you control no face-up monsters: You can Special Summon this card from your hand in Defense Position. Once per turn: You can change this card to face-down Defense Position.

Subterror Fiendess

Spellcaster/Effect

During either player's turn, when your opponent activates a card or effect: You can send this card from your hand or field to the Graveyard, then target 1 "Subterror" monster you control; negate the activation, then change the targeted monster to face-down Defense Position. You can target 1 face-up monster you control; change it to face-down Defense Position, and if you do, Special Summon 1 "Subterror" monster from your hand or Graveyard, in face-up or face-down Defense Position. You can only use each effect of "Subterror Fiendess" once per turn.

Subterror Guru

Dragon/Flip/Effect

FLIP: You can add 1 "Subterror" card from your Deck to your hand, except "Subterror Guru". You can target 1 other face-up monster on the field; change both it and this card to face-down Defense Position. This effect can be activated during either player's turn, if you control another "Subterror" card. You can only use each effect of "Subterror Guru" once per turn.

Subterror Nemesis Archer

Fairy/Effect

At the start of the Damage Step, if this card attacks an opponent's face-down Defense Position monster, and you control another "Subterror" monster: You can shuffle that opponent's monster into the Deck. If this card on the field is destroyed by battle or card effect and sent to the Graveyard: You can Special Summon 1 "Subterror" monster from your Deck in face-up or face-down Defense Position. You can only use each effect of "Subterror Nemesis Archer" once per turn.

Subterror Nemesis Warrior

Warrior/Effect

During either player's turn: You can send 1 "Subterror" monster from your Deck to the Graveyard; Tribute this card and at least 1 other monster so the total original Levels Tributed equal or exceed the Level of that "Subterror" monster in the Graveyard, and if you do, Special Summon that monster in face-up or face-down Defense Position. If a "Subterror Behemoth" monster is flipped face-up while this card is in your Graveyard: You can Special Summon this card. You can only use each effect of "Subterror Nemesis Warrior" once per turn.

Book of Moon

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

Pot of Extravagance

At the start of your Main Phase 1: Banish 3 or 6 random face-down cards from your Extra Deck, face-down; draw 1 card for every 3 cards banished. For the rest of this turn after this card resolves, you cannot draw cards by card effects.

Subterror Cave Clash

All "Subterror" monsters you control gain 500 ATK and DEF for each Set monster on the field. Once per turn, when a "Subterror" monster you control inflicts battle damage to your opponent: You can target 1 "Subterror" card in your Graveyard, except "Subterror Cave Clash"; add it to your hand.

Terraforming

Add 1 Field Spell Card from your Deck to your hand.

The Hidden City

When this card is activated: You can add 1 "Subterror" monster from your Deck to your hand. Once per turn: You can change 1 face-down Defense Position "Subterror" monster you control to face-up Attack or Defense Position. Once per turn, when an opponent's monster declares an attack: You can change 1 face-down Defense Position "Subterror" monster you control to face-up Attack or Defense Position, then you can negate the attack. You can only activate 1 "The Hidden City" per turn.

Twin Twisters

Discard 1 card, then target up to 2 Spell/Trap Cards on the field; destroy them.

Infinite Impermanence

Target 1 face-up monster your opponent controls; it has its effects negated (until the end of this turn), then if this card is activated while it was Set, negate the effects of other Spells/Traps in this card's column this turn. If you control no cards, you can activate this card from your hand.

Solemn Warning

When a monster(s) would be Summoned, OR when a Spell/Trap Card, or monster effect, is activated that includes an effect that Special Summons a monster(s): Pay 2000 LP; negate the Summon or activation, and if you do, destroy that card.

Subterror Final Battle

Activate 1 of these effects, also, after that, Set this card face-down instead of sending it to the Graveyard.
- Change 1 Set "Subterror" monster on the field to face-up Attack or Defense Position.
- Change 1 face-up "Subterror" monster on the field to face-down Defense Position.
- ATK and DEF of 1 "Subterror" monster on the field become equal to its combined original ATK and DEF until the end of this turn.
- This turn, activated effects of "Subterror" cards cannot be negated.

Summon Limit

Neither player can Summon more than two times per turn.

There Can Be Only One

Each player can only control 1 monster of each Type. If a player controls 2 or more monsters of the same Type, they must send some to the GY so they control no more than 1 monster of that Type.

Knightmare Cerberus

Fiend/Link/Effect

2 monsters with different names
If this card is Link Summoned: You can discard 1 card, then target 1 Special Summoned monster in your opponent's Main Monster Zone; destroy it, then if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of "Knightmare Cerberus" once per turn. Your co-linked monsters cannot be destroyed by card effects.

Knightmare Gryphon

Fiend/Link/Effect

2+ monsters with different names
If this card is Link Summoned: You can discard 1 card, then target 1 Spell/Trap in your GY; Set it to your field, but it cannot be activated this turn, then if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of "Knightmare Gryphon" once per turn. Special Summoned monsters cannot activate their effects, unless they are linked.

Knightmare Phoenix

Fiend/Link/Effect

2 monsters with different names
If this card is Link Summoned: You can discard 1 card, then target 1 Spell/Trap your opponent controls; destroy it, then, if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of "Knightmare Phoenix" once per turn. Co-linked monsters you control cannot be destroyed by battle.

Knightmare Unicorn

Fiend/Link/Effect

2+ monsters with different names
If this card is Link Summoned: You can discard 1 card, then target 1 card on the field; shuffle it into the Deck, then if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of "Knightmare Unicorn" once per turn. While a co-linked "Knightmare" monster(s) is on the field, draw cards equal to the number of those monsters with different names instead of 1 for your normal draw during your Draw Phase.

Wee Witch's Apprentice

Spellcaster/Link/Effect

2 DARK monsters
All DARK monsters on the field gain 500 ATK/DEF, also all LIGHT monsters on the field lose 400 ATK/DEF. If this card is destroyed by battle or card effect: You can target 1 DARK monster in your GY; add it to your hand. You can only use this effect of "Wee Witch's Apprentice" once per turn.