First strike

Landfall — Whenever a land enters the battlefield under your control, Ondu Greathorn gets +2/+2 until end of turn.

Whenever a creature attacks this turn, it gains lifelink until end of turn.

Awaken 4— (If you cast this spell for , also put four +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.)

Whenever an enchantment enters the battlefield under your control, you may create a token that's a copy of it. Do this only once each turn.

Choose one —

• Create a 5/5 green Beast creature token.

• Create five 1/1 green Insect creature tokens.

Entwine (Choose both if you pay the entwine cost.)

At the beginning of each upkeep, if a player cast two or more spells last turn, transform One of the Pack.

Enchant creature

Enchanted creature can't attack or block, and its activated abilities can't be activated.

At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life.

Enchant creature

Whenever enchanted creature deals combat damage to a player, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Flash

Enchant creature you control

Whenever enchanted creature or another modified creature you control dies, create X 1/1 colorless Spirit creature tokens, where X is that creature's power. (Equipment, Auras you control, and counters are modifications.)

You may look at the top card of your library any time.

You may play lands and cast spells from the top of your library.

Once during each of your turns, you may cast a spell from your hand or the top of your library without paying its mana cost.

Enchant creature

Enchanted creature gets +2/+2 and has flying.

Defender

Creatures with flying your opponents control get -1/-0.

Whenever one or more creatures you control deal combat damage to a player, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

, Exile a creature card from your graveyard: Investigate. You gain 2 life.

Enchant creature

At the beginning of your upkeep, sacrifice a creature.

Enchanted creature gets +3/+3 and has trample.

Enchanted creature is a Demon Spirit.

Whenever you cast a creature spell, tap target creature.

Target creature gets +X/+0 until end of turn, where X is its power.

: Target creature you control gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy it.)

Flying

: Choose a color. Target opponent exiles the top X cards of their library. For each card of the chosen color exiled this way, create a 1/1 blue and black Faerie Rogue creature token with flying.

Defender, flying

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Flying

Discard a card: Oona's Prowler gets -2/-0 until end of turn. Any player may activate this ability.

, Sacrifice a non-Ooze creature: Create an X/X green Ooze creature token, where X is the sacrificed creature's power. Activate only as a sorcery.

When an opponent casts a creature spell, if Opal Archangel is an enchantment, Opal Archangel becomes a 5/5 Angel creature with flying and vigilance.

When an opponent casts a creature spell, if Opal Caryatid is an enchantment, Opal Caryatid becomes a 2/2 Soldier creature.

When an opponent casts a creature spell, if Opal Gargoyle is an enchantment, Opal Gargoyle becomes a 2/2 Gargoyle creature with flying.

When Opal Lake Gatekeepers enters the battlefield, if you control two or more Gates, you may draw a card.

When an opponent casts a creature spell, if Opal Titan is an enchantment, Opal Titan becomes a 4/4 Giant creature with protection from each of that spell's colors.

Defender (This creature can't attack.)

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)

: The next time a source of your choice would deal damage this turn, that damage is dealt to Opal-Eye, Konda's Yojimbo instead.

: Prevent the next 1 damage that would be dealt to Opal-Eye this turn.

All Slivers have "Whenever this permanent becomes the target of a spell an opponent controls, you may draw a card."

Open Fire deals 3 damage to any target.

Search your library for an Aura or Equipment card, reveal it, put it into your hand, then shuffle.

Whenever a nontoken creature you control dies, create a 2/2 black Zombie creature token.

Return all artifact and enchantment cards from all graveyards to the battlefield under their owners' control. (Auras with nothing to enchant remain in graveyards.)

Add . You may open a sealed Magic booster pack. Until end of turn, you may cast spells from among the cards in that booster pack.

Flash (You may cast this spell any time you could cast an instant.)

Enchant creature

Whenever enchanted creature deals damage to an opponent, you may draw a card.

: Opportunist deals 1 damage to target creature that was dealt damage this turn.

Target player draws four cards.

Flash

You control your opponents while they're searching their libraries.

While an opponent is searching their library, they exile each card they find. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them.

Enchant creature

Enchanted creature can't attack or block unless its controller pays .

Activated abilities of enchanted creature cost more to activate.

Scry 1.

Draw a card.

Living metal (As long as it's your turn, this Vehicle is also a creature.)

Trample

Whenever you attack, bolster 2. The chosen creature gains trample until end of turn. When that creature deals combat damage to a player this turn, convert Optimus Prime.

Opulent Palace enters the battlefield tapped.

: Add , , or .

Haste

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

When Oracle of Bones enters the battlefield, if tribute wasn't paid, you may cast an instant or sorcery spell from your hand without paying its mana cost.

You may play an additional land on each of your turns.

Play with the top card of your library revealed.

You may play lands from the top of your library.

When Oracle of Tragedy enters the battlefield or dies, choose one —

• Draw a card, then discard a card.

• Shuffle up to four target cards with mana value 3 or greater from your graveyard into your library.

Enchant creature

Enchanted creature has ": Scry 1, then draw a card." (To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.)

Lifelink

Whenever Orah, Skyclave Hierophant or another Cleric you control dies, return target Cleric card with lesser mana value from your graveyard to the battlefield.

: Oran-Rief Invoker gets +5/+5 and gains trample until end of turn.

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

Reach (This creature can block creatures with flying.)

When Oran-Rief Recluse enters the battlefield, if it was kicked, destroy target creature with flying.

Oran-Rief, the Vastwood enters the battlefield tapped.

: Add .

: Put a +1/+1 counter on each green creature that entered the battlefield this turn.

Protection from red

, , Sacrifice Orazca Puzzle-Door: Look at the top two cards of your library. Put one of those cards into your hand and the other into your graveyard.