Browse Cards -- 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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Oneiros, the Dream Mirror Tormentor

Types

Fiend / Fusion / Effect

Attribute

Dark

Level (10)

Star Star Star Star Star Star Star Star Star Star

Text

2 "Dream Mirror" monsters with different Attributes

While face-up on the field, this card is also LIGHT-Attribute. You can only use each of the following effects of "Oneiros, the Dream Mirror Tormentor" once per turn.

● When a monster effect is activated while "Dream Mirror of Terror" is in a Field Zone (Quick Effect): You can negate that effect.

● If "Dream Mirror of Joy" is in a Field Zone (Quick Effect): You can Tribute this card; Special Summon 1 "Oneiros, the Dream Mirror Erlking" from your Extra Deck in Defense Position.

Oni Tank T-34

Types

Machine / Normal

Attribute

Earth

Level (4)

Star Star Star Star

Text

An armored tank possessed by a fiend that will pursue enemies until they're crushed.

Oni-Gami Combo

Property

Normal

Text

Target 1 face-up Xyz Monster you control and detach all of its Xyz Material; this turn, that target can attack twice during the same Battle Phase.

Onibimaru Soul Sweeper

Types

Fiend / Xyz / Effect

Attribute

Dark

Rank (2)

Star Star

Text

2+ Level 2 monsters

You can detach 1 material from this card, then target 1 monster your opponent controls; banish it until your opponent's End Phase. If this card in its owner's control is destroyed by an opponent's card: You can target banished monsters, up to the number of materials this card had; shuffle them into the Deck. You can only use each effect of "Onibimaru Soul Sweeper" once per turn.

Onikuji

Property

Continuous

Text

Once per turn, during your Standby Phase: Your opponent declares 1 card type (Monster, Spell, or Trap). Excavate the top card of your Deck, then if it is that type of card, your opponent draws 1 card. Otherwise, discard 1 random card from their hand. Place the excavated card on the bottom of your Deck.

Onmoraki

Types

Zombie / Effect

Attribute

Earth

Level (4)

Star Star Star Star

Text

If this card in your possession is destroyed by an opponent's card effect and sent to your GY, or if this card is Special Summoned from the GY: You can draw 1 card. You can only use this effect of "Onmoraki" once per turn.

Onomatopaira

Property

Normal

Text

You can only activate 1 "Onomatopaira" per turn. Send 1 card from your hand to the GY; add up to 2 of these monsters from your Deck to your hand (you cannot add 2 from the same category).

● 1 "Zubaba" monster

● 1 "Gagaga" monster

● 1 "Gogogo" monster

● 1 "Dododo" monster

Onomatopia

Property

Field

Text

Each time a "Utopia" monster(s) is Special Summoned to your side of the field, place 1 Hi-Five the Sky Counter on this card. All monsters you control gain 200 ATK and DEF for each Hi-Five the Sky Counter on this card. Once per turn: You can remove 2 Hi-Five the Sky Counters from this card; Special Summon 1 "Zubaba", "Gagaga", "Gogogo", or "Dododo" monster from your Deck.

Onomatopickup

Property

Continuous

Text

When this card is activated: You can add 1 "Onomat" card from your Deck to your hand, except "Onomatopickup". You can target 1 "Zubaba", "Gagaga", "Gogogo", or "Dododo" monster you control; all monsters you currently control become that monster's Level until the end of this turn (even if this card leaves the field). You can only use this effect of "Onomatopickup" once per turn. You can only activate 1 "Onomatopickup" per turn.

Onslaught of the Fire Kings

Property

Normal

Text

If your opponent controls a monster and you control no monsters: Special Summon 1 FIRE Beast, Beast-Warrior, or Winged Beast monster from your Deck. Its effects are negated, also it is destroyed during the End Phase. You can only activate 1 "Onslaught of the Fire Kings" per turn.

Ooguchi

Types

Aqua / Effect

Attribute

Water

Level (1)

Star

Text

This monster may attack your opponent's Life Points directly.

Ookazi

Property

Normal

Text

Inflict 800 damage to your opponent.

Oops!

Property

Normal

Text

Target 1 card you control; destroy it.

Opening of the Spirit Gates

Property

Continuous

Text

When this card is activated: Add 1 "Uria, Lord of Searing Flames", "Hamon, Lord of Striking Thunder", or "Raviel, Lord of Phantasms", OR 1 monster that specifically lists any of those cards in its text, from your Deck to your hand. Once per turn: You can discard 1 card; Special Summon 1 Fiend monster with 0 ATK/DEF from your GY. Once per turn, if you control a Level 10 monster: You can add 1 Continuous Spell from your GY to your hand. You can only activate 1 "Opening of the Spirit Gates" per turn.

Opera the Melodious Diva

Types

Fairy / Effect

Attribute

Light

Level (4)

Star Star Star Star

Text

Cannot attack the turn it is Normal Summoned or flipped face-up. If this card is sent to the Graveyard as a Fusion Material for a Fusion Summon: You can activate this effect; for the rest of this turn, "Melodious" monsters you control cannot be destroyed by battle or card effects.

Oppressed People

Types

Aqua

Attribute

Water

Level (1)

Star

Text

They are oppressed, but believe they will have their freedom someday.

Opti-Camouflage Armor

Property

Equip

Text

You can only equip this card to a Level 1 monster. A monster equipped with this card can attack your opponent's Life Points directly.

Opticlops

Types

Fiend / Normal

Attribute

Dark

Level (4)

Star Star Star Star

Text

A one-eyed giant that serves the "Dark Ruler Ha Des", it skewers its enemies with its sharp horn, shattering them to pieces.

Option Hunter

Property

Normal

Text

Activate only when a monster you control is destroyed by battle and sent to the Graveyard. Gain Life Points equal to the original ATK of the destroyed monster.

Option Token

Types

Normal

Attribute

?

Level (0)

Text

This card can be used as an "Option Token".


*If used for another Token, apply that Token's Type/Attribute/Level/ATK/DEF.

Oracle of Zefra

Property

Field

Text

When this card is activated: Add 1 "Zefra" monster from your Deck to your hand. When you Ritual Summon using a "Zefra" monster, or Special Summon using a "Zefra" monster as material, you can activate these effects depending on the monster Summoned, once per turn per effect:

● Ritual: Shuffle 1 monster on the field into the Deck.

● Fusion: Special Summon 1 monster from your hand.

● Synchro: Choose 1 monster from your Deck and place it on top of your Deck.

● Xyz: Draw 1 card, then discard 1 card.

You can only activate 1 "Oracle of Zefra" per turn.

Oracle of the Herald

Property

Ritual

Text

This card is used to Ritual Summon "Herald of Ultimateness". You must also Tribute monsters from your hand or field whose total Levels equal 12 or more. Your opponent cannot activate cards or effects in response to this card's activation.

Oracle of the Sun

Types

Spellcaster / Effect

Attribute

Light

Level (5)

Star Star Star Star Star

Text

If only your opponent controls a monster, you can Special Summon this card (from your hand). When this card on the field is destroyed and sent to the GY: You can add 1 "Fire Ant Ascator" or "Supay" from your Deck to your hand.

Orb of Yasaka

Property

Equip

Text

Equip only to a Spirit monster. When it destroys an opponent's monster by battle and sends it to the Graveyard, gain Life Points equal to that monster's original ATK. When the equipped monster you control is returned to the hand and this card is sent to the Graveyard, return this card to your hand.

Orbital 7

Types

Machine / Effect

Attribute

Light

Level (4)

Star Star Star Star

Text

When this card is flipped face-up: Place 1 You Got It Boss! Counter on it. You can remove all You Got It Boss! Counters on this card; its ATK becomes 2000. After you change this card's ATK with this effect, it cannot attack your opponent directly for the rest of this turn, and is sent to the Graveyard during the End Phase. You can Tribute this card to target 1 "Photon" or "Galaxy" monster in your Graveyard; add that target to your hand.


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