Orchard Spirit can't be blocked except by creatures with flying or reach.

Whenever another Treefolk creature you control enters, you may gain life equal to that creature's toughness.

, Sacrifice a creature: Orcish Bloodpainter deals 1 damage to any target.

Orcish Cannonade deals 2 damage to any target and 3 damage to you.

Draw a card.

: Flip a coin. If you win the flip, target Orc creature gets +2/+0 until end of turn. If you lose the flip, it gets -0/-2 until end of turn.

: Target land becomes a Swamp until its controller's next untap step.

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

When Orcish Hellraiser dies, it deals 2 damage to target player or planeswalker.

, Sacrifice a Forest: Add three mana in any combination of and/or .

Target creature gains your choice of lifelink or indestructible until end of turn.

Amass Orcs 1. (Put a +1/+1 counter on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)

Attacking creatures you control get +1/+0.

, , Sacrifice Orcish Settlers: Destroy X target lands.

: Look at the top three cards of target player's library.

, Sacrifice an artifact: Orcish Vandal deals 2 damage to any target.

Flying, trample

When Orcus, Prince of Undeath enters, choose one —

• Each other creature gets -X/-X until end of turn. You lose X life.

• Return up to X target creature cards with total mana value X or less from your graveyard to the battlefield. They gain haste until end of turn.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Flying, lifelink, haste

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Other Vampires you control have exalted.

Whenever Order of the Golden Cricket attacks, you may pay . If you do, it gains flying until end of turn.

, Pay 1 life: Counter target black spell.

: Prevent the next 1 damage that would be dealt to Ordruun Commando this turn.

This spell costs less to cast for each land card in your graveyard.

Flying, haste

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)

Destroy all nonartifact creatures.

If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost.

Prevent the next 4 damage that would be dealt to any target this turn.

Flying, lifelink, indestructible, haste

Flying

If you would draw a card while your library has no cards in it, instead put five +1/+1 counters on Ormos, Archive Keeper.

, Discard three cards with different names: Draw five cards.

Flying

Tribute 2 (As this creature enters, an opponent of your choice may put two +1/+1 counters on it.)

When Ornitharch enters, if tribute wasn't paid, create two 1/1 white Bird creature tokens with flying.

Orochi Hatchery enters with X charge counters on it.

, : Create a 1/1 green Snake creature token for each charge counter on Orochi Hatchery.

: Add .

As long as Orochi Merge-Keeper is modified, it has ": Add ." (Equipment, Auras you control, and counters are modifications.)

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

Whenever one or more creatures you control deal combat damage to a player, create a Treasure token and manifest the top card of that player's library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Vigilance

Orthodoxy Enforcer gets +2/+0 as long as you control two or more artifacts.

Choose one —

• Return target creature you control and all Auras you control attached to it to their owner's hand.

• Destroy target creature and you lose life equal to its toughness.

• Return target creature card with mana value 1 or less from your graveyard to the battlefield.

Deathtouch

Afterlife 1 (When this creature dies, create a 1/1 white and black Spirit creature token with flying.)

Whenever Orzhov Racketeers deals combat damage to a player, that player discards a card.

Afterlife 2 (When this creature dies, create two 1/1 white and black Spirit creature tokens with flying.)

Vigilance

, Sacrifice an artifact: Target creature you control gets +2/+0 until end of turn.

, , Exile an artifact card with mana value X from your graveyard: Create two tokens that are copies of the exiled card. Activate only as a sorcery.

Lifelink

Delirium — At the beginning of your end step, if there are four or more card types among cards in your graveyard, each opponent may sacrifice a nonland permanent of their choice or discard a card. Then Osseous Sticktwister deals damage equal to its power to each opponent who didn't sacrifice a permanent or discard a card this way.

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.)

: Add .

Channel — , Discard Otawara, Soaring City: Return target artifact, creature, enchantment, or planeswalker to its owner's hand. This ability costs less to activate for each legendary creature you control.

Flying

Whenever Oteclan Levitator attacks, target attacking creature without flying gains flying until end of turn.

Flash

When Otherworldly Escort dies, if it's not a Spirit, return it to the battlefield under its owner's control with four charge counters on it. It's a Spirit Detective. (It's no longer a Human.)

, , Remove a charge counter from Otherworldly Escort: Destroy target creature that dealt damage to you this turn.

Art rampage 2 (Whenever this creature becomes blocked by a creature, it gets +2/+2 for each creature in the blocker's art beyond the first.)

When Outcaster Greenblade enters, search your library for a basic land card or a Desert card, reveal it, put it into your hand, then shuffle.

Outcaster Greenblade gets +1/+1 for each Desert you control.

Renown 6 (When this creature deals combat damage to a player, if it isn't renowned, put six +1/+1 counters on it and it becomes renowned.)

Outland Colossus can't be blocked by more than one creature.

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.)

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

Whenever a player taps a land for mana, that player adds one mana of any type that land produced, and Overabundance deals 1 damage to the player.

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.

Discard a card, Sacrifice Overeager Apprentice: Add .

Defender

: You gain 1 life.

, Sacrifice Overgrown Arch: Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Target creature you control gets +3/+3 and gains trample, hexproof, and indestructible until end of turn.

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.)

Creatures you control gain vigilance and trample until end of turn. Roll a d20.

1–9 | Creatures you control get +2/+2 until end of turn.

10–19 | Put two +1/+1 counters on each creature you control.

20 | Put four +1/+1 counters on each creature you control.

Whenever you attack with three or more creatures, draw a card.