15282 cards found
Oozing Yaoguai

Oozing Yaoguai {2}{B}{G}

Creature - Frog Spirit
When Oozing Yaoguai enters or a creature you control scavenges it, up to one target creature gets -3/-3 until end of turn and you gain 3 life.
Scavenge {3}{B}{G} ({3}{B}{G}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)
3/4
Opaline Drake

Opaline Drake {2}{U}{U}

Creature - Drake
Flying
At the beginning of your end step, up to one other target creature you control voyages. (If it isn't blocking or targeted by another spell or ability, it phases out.)
Whenever a creature you control phases in, you may have it become a copy of target creature you control until end of turn.
3/3
  • Dark Seas of Shiryen
Open Eyes

Open Eyes {G}{U}

Sorcery - Adventure
Search your library for a land card, reveal it, then shuffle and put that card on top. (Then exile this card. You may play the land later from exile.)
Card has other part: Northrime Aurora
  • Adventurers of Onora
Open Road

Open Road {R}

Enchantment
Whenever Open Road or another permanent you control enters, if it has the greatest mana value among permanents you control, you may discard a card. If you do, draw a card.
Open Source

Open Source {2}

Enchantment
At the beginning of your upkeep, each player conjures a card named Data-Point into their hand. (It's a sorcery that costs {2} with “Draw a card.”)
“In a just world there is no ownership. Creation belongs to us all.”
—Sallmar, Father of the Free
Related card: Data-Point
  • Beyond the Blackwall
Open the Hive

Open the Hive {1}{W}{W}

Sorcery
For each nonland token you control, create a token that's a copy of it.
The insect queen had run out of patience. She would stake her claim here, no matter what the current inhabitants had to say about it.
  • Sparks of a Multiverse
Open the Secret Paths

Open the Secret Paths {2}{U}

Instant
Exile two target permanents you control, then return them to the battlefield under your control.
Operation 433

Operation 433 {1}{B}

Sorcery
Search your library for a creature or sorcery card, put it into your graveyard, then shuffle.
Reconstruct {2}{B} (You may cast this from your graveyard for its reconstruct cost reduced by the mana value of a permanent you sacrifice as you cast it this way. Then exile this.)
  • Animus Vox
Operative BABY

Operative BABY {2/W}{2/W}{2/W}

Artifact Creature - Elemental
Lifelink
Whenever Operative BABY attacks or you cast a black or red spell, create a 1/1 blue Elemental creature token with flying.
“What's higher than the top? That's me.”
4/4
  • Animus Vox
Operative GINGER

Operative GINGER {2/R}{2/R}{2/R}

Artifact Creature - Elemental
Menace
Whenever Operative GINGER attacks or you cast a blue or white spell, Operative GINGER deals 1 damage to any target.
“Let me show you what you've been missing.”
4/4
  • Animus Vox
Operative POSH

Operative POSH {2/U}{2/U}{2/U}

Artifact Creature - Elemental
Flash
Whenever Operative POSH attacks or you cast a green or red spell, exile up to one target nontoken permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.
“So keep your eyes on me now.”
4/4
  • Animus Vox
Operative SCARY

Operative SCARY {2/B}{2/B}{2/B}

Artifact Creature - Elemental
Deathtouch
Whenever Operative SCARY attacks or you cast a green or white spell, you may draw a card. If you do, you lose 2 life.
“Watch it fill you full of dread.”
4/4
  • Animus Vox
Operative SPORTY

Operative SPORTY {2/G}{2/G}{2/G}

Artifact Creature - Elemental
Ward {3}
Whenever Operative SPORTY attacks or you cast a blue or black spell, put a +1/+1 counter on Operative SPORTY.
“When you see me coming, get out of my way.”
4/4
  • Animus Vox
Ophan Titan

Ophan Titan {3}{G}

Creature - Angel
Ophan Titan gets +3/+3 as long as there are no nonland cards in your graveyard.
Morph {1}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
“There, in the horizon. It's coming. Bring out the good ale and prepare the festival grounds. Today's the day we die.”
—Zehara, Bahumite village elder
3/3
  • MSEM Secret Lair Drops
  • Mious
Ophidian Augury

Ophidian Augury {4}{U}{U}

Enchantment
Once each turn, you may pay {U} rather than pay the mana cost for a blue spell you cast.
“See the beyond. Taste it. Consume it as it consumes you. Become one with the infinite void and learn true power.”
  • Kahembo: Olde Dawn
Opportunistic Raiders

Opportunistic Raiders {2}{B/R}{B/R}

Creature - Human Rogue
Bleed {1}{B/R} (You may cast this spell for its bleed cost if an opponent has lost life this turn.)
Haste
When Opportunistic Raiders enters, if it's your main phase, after this phase, there is an additional combat phase followed by an additional main phase.
3/3
  • A Tourney at Whiterun
Oppress the Weak

Oppress the Weak {U}{B}

Instant
Target creature gets -4/-4 until end of turn.
Civilized — Draw a card if you control an artifact, a creature, and an enchantment.
“Until my dying breath,” he whispered, cradling the youngling to his breast.
Opt

Opt {U}

Instant
Scry 1.
Draw a card.
“I stole Death long ago, and search now for the dark path.”
—Ranni the Witch
Oracle's Disciple

Oracle's Disciple {U/R}{U/R}

Creature - Human Wizard Knight
Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn.
“Symmetry precludes mystery. Only where it is broken by imbalance can we find something to puzzle over.”
2/2
Oracle's Omission

Oracle's Omission {U}

Instant
Search your library for up to six cards and exile them face down. Shuffle, then draw a card.
“Did the sphinxes betray us, or were they blinded by a greater force?”
  • The Unraveling
Orb of Undoing

Orb of Undoing {3}

Artifact
Whenever another nonland permanent you control enters, return that permanent to its owner's hand at the beginning of the next end step.
  • The Unraveling
Order Module

Order Module {2}{W}{W}

Enchantment - Module
(Activate each submodule once as a sorcery. When this enters, activate one submodule for free.)
{W}{W}{W}: Purpose
Create three 1/1 white Spirit creature tokens with flying.
{W}{W}{W}: Justice
Exile target nonland permanent you don't control until Order Module leaves the battlefield.
{W}{W}{W}: Unity
Order Module gains “Creatures you control get +1/+1.”
Organic Dreadnought

Organic Dreadnought {5}{U}{U}

Creature - Leviathan Chimera
As an additional cost to cast this spell, you may tap any number of untapped tokens you control. This spell costs {1} less to cast for each token tapped this way.
Whenever Organic Dreadnought enters or attacks, tap target permanent an opponent controls. That permanent doesn't untap during its controller's next untap step.
7/8
  • The Empty Throne of Feanav
Oriq Soulweaver

Oriq Soulweaver {B}{B}{B}

Creature - Human Warlock
Whenever you cast a black spell, choose up to X, where X is the number of black mana symbols in that spell's mana cost —
• Target player loses 1 life and you gain 1 life.
• Put a -1/-1 counter on target creature.
• You draw a card and you lose 3 life.
• Exile target card in a graveyard.
3/3
Orlesia, First of the Sen

Orlesia, First of the Sen {W}{U}{B}

Legendary Artifact Creature - Wizard
Your opponents play with the top card of their library revealed.
Your opponents can't cast spells during your turn.
You may play lands and cast spells from the top of an opponent's library during your turn.
1/3