Orzhov Basilica enters tapped.

When Orzhov Basilica enters, return a land you control to its owner's hand.

: Add .

Haunt (When this creature dies, exile it haunting target creature.)

When Orzhov Euthanist enters or the creature it haunts dies, destroy target creature that was dealt damage this turn.

: Target player gains 1 life.

: Each player loses 1 life.

: Add .

, : Target player loses 1 life and you gain 1 life.

When you cast this spell, create a token that's a copy of it, except it isn't legendary.

: Add . Spend this mana only to cast an artifact spell or activate an ability of an artifact.

Paradox — Whenever you cast a spell from anywhere other than your hand, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Enchant basic land you control

When Ossification enters, exile target creature or planeswalker an opponent controls until Ossification leaves the battlefield.

Deathtouch

: Until end of turn, you may cast creature spells from your graveyard by foraging in addition to paying their other costs. If you cast a spell this way, that creature enters with a finality counter on it. (To forage, exile three cards from your graveyard or sacrifice a Food. If a creature with a finality counter on it would die, exile it instead.)

Target opponent reveals their hand. You choose a creature card from it. That player discards that card.

Otarian Juggernaut can't be blocked by Walls.

Threshold — As long as seven or more cards are in your graveyard, Otarian Juggernaut gets +3/+0 and attacks each combat if able.

When Oteclan Landmark enters, scry 2.

Craft with artifact (, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

Dinosaur spells you cast cost less to cast.

: Target Dinosaur gains haste until end of turn.

: Put a charge counter on Otherworld Atlas.

: Each player draws a card for each charge counter on Otherworld Atlas.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Trample

Whenever this creature deals combat damage to a player, return target creature card with mutate from your graveyard to your hand.

, Sacrifice Ouphe Vandals: Counter target activated ability from an artifact source and destroy that artifact if it's on the battlefield. (Mana abilities can't be targeted.)

This spell costs less to cast if it targets a creature spell.

Counter target spell.

You may discard a Swamp card rather than pay this spell's mana cost.

Choose a creature type. All creatures of that type get -1/-1 until end of turn.

When Outcaster Trailblazer enters, add one mana of any color.

Whenever another creature you control with power 4 or greater enters, draw a card.

Plot (You may pay and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Outland Boar can't be blocked by creatures with power 2 or less.

, Sacrifice Outland Liberator: Destroy target artifact or enchantment.

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

When Outlaw Stitcher enters, create a 2/2 blue and black Zombie Rogue creature token, then put two +1/+1 counters on that token for each spell you've cast this turn other than the first.

Plot (You may pay and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

At the beginning of your upkeep, choose one at random. Create a red and white creature token with those characteristics.

• 3/1 Human Warrior with trample and haste.

• 2/1 Human Cleric with lifelink and haste.

• 1/2 Human Rogue with haste and "When this creature enters, it deals 1 damage to any target."

Chroma — When Outrage Shaman enters, it deals damage to target creature equal to the number of red mana symbols in the mana costs of permanents you control.

Whenever an artifact you control enters, you may return Ovalchase Daredevil from your graveyard to your hand.

Creature cards in graveyards can attack and block as though they were on the battlefield, can block or be blocked only by creature cards in graveyards, are Zombies in addition to their other types, and have undeathtouch. (If they would deal damage to a creature card, exile that creature card instead.)

Creature cards in your graveyard have haste.

Each time target permanent would deal damage to a permanent or player this turn, it deals double that damage to that permanent or player instead.

Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

At the beginning of combat on your turn, you may pay . If you do, put a +1/+1 counter on Overclocked Electromancer.

Whenever Overclocked Electromancer attacks, double its power until end of turn.

Whenever Overclocked Electromancer deals combat damage to a creature, if that creature was dealt excess damage this turn, you get X , where X is that excess damage.

, : Add .

Enrage — Whenever Overgrown Armasaur is dealt damage, create a 1/1 green Saproling creature token.

Sacrifice a land: You gain 3 life.

When Overgrowth Elemental enters, put a +1/+1 counter on another target Elemental you control.

Whenever another creature you control dies, you gain 1 life. If that creature was an Elemental, put a +1/+1 counter on Overgrowth Elemental.

Kicker (You may pay an additional as you cast this spell.)

Destroy target artifact if its mana value is 2 or less. If this spell was kicked, destroy that artifact if its mana value is 5 or less instead.

The next instant or sorcery spell you cast this turn can't be countered.

Draw a card.

Flying

When Overseer of the Damned enters, you may destroy target creature.

Whenever a nontoken creature an opponent controls dies, create a tapped 2/2 black Zombie creature token.

Menace

Whenever Overt Operative deals combat damage to a player, it assembles a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)

When Overwhelmed Apprentice enters, each opponent mills two cards. Then you scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Surge (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)

This spell can't be countered.

Counter target spell.

Whenever you commit a crime during your turn, Overzealous Muscle gains indestructible until end of turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime. Damage and effects that say "destroy" don't destroy a creature with indestructible.)

When Ovinomancer enters, sacrifice it unless you return three basic lands you control to their owner's hand.

, Return Ovinomancer to its owner's hand: Destroy target creature. It can't be regenerated. That creature's controller creates a 0/1 green Sheep creature token.

Partner with Blue, Loyal Raptor

: Put your choice of a menace, trample, reach, or haste counter on target Dinosaur. Activate only as a sorcery.

Trample

Keen Senses — When Owlbear enters, draw a card.

At the beginning of your end step, if creatures you control have total power 8 or greater, draw a card.

When Ox of Agonas enters, discard your hand, then draw three cards.

Escape—, Exile eight other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Ox of Agonas escapes with a +1/+1 counter on it.

Affinity for Equipment (This spell costs less to cast for each Equipment you control.)

Trample

When Oxidda Scrapmelter enters, destroy target artifact.

Flying

Whenever you cast a Spirit or Arcane spell, create a 3/3 white Spirit creature token with flying.

, : Tap target artifact or creature.

Attacking creatures get +X/+0 until end of turn, where X is the number of players being attacked.

Draw a card.

Search your library for up to three cards with the same name as target creature, reveal them, put them into your hand, then shuffle.

: Each creature you control named Pack Mastiff gets +1/+0 until end of turn.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. If you control a Wolf or Werewolf, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)