If you would draw a card, you may instead choose land or nonland and reveal cards from the top of your library until you reveal a card of the chosen kind. Put that card into your hand and put all other cards revealed this way on the bottom of your library in any order.
When Academy Researchers enters the battlefield, you may put an Aura card from your hand onto the battlefield attached to Academy Researchers.
T: Add C.
T: Add W or U. Adarkar Wastes deals 1 damage to you.
Target creature gets -1/-1 until end of turn.
Draw a card.
Target creature gets +1/+1 until end of turn.
Look at target player's hand and choose two cards from it. Put them on top of that player's library in any order.
3: Target player puts the top three cards of their library into their graveyard.
First strike (This creature deals combat damage before creatures without first strike.)
When Ancestor's Chosen enters the battlefield, you gain 1 life for each card in your graveyard.
When Angel of Mercy enters the battlefield, you gain 3 life.
Target creature gets +3/+3 and gains flying until end of turn. (It can't be blocked except by creatures with flying or reach.)
Whenever a creature enters the battlefield under your control, you gain life equal to its toughness.
Defender (This creature can't attack.)
Whenever a player casts a white spell, you may gain 1 life.
Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.)
Enchanted creature gets +2/+2 and has "T: This creature deals 1 damage to any target."
T: Draw three cards.
2UU: Return Arcanis the Omnipotent to its owner's hand.
Flying (This creature can't be blocked except by creatures with flying or reach.)
Other black creatures get +1/+1.
Nonblack creatures get -1/-1.
Destroy target tapped creature.
Gain control of target Aura that's attached to a permanent. Attach it to another permanent it can enchant.
Artifact and enchantment spells your opponents cast cost 2 more to cast.
Sacrifice Aura of Silence: Destroy target artifact or enchantment.
If an opponent controls at least four more creatures than you, this spell costs 6 less to cast.
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
When Aven Cloudchaser enters the battlefield, destroy target enchantment.
When Aven Fisher dies, you may draw a card.
1U: Target player reveals the top card of their library.
XW, T: Ballista Squad deals X damage to target attacking or blocking creature.
Prevent the next 1 damage that would be dealt to any target this turn.
T: Add R or W. Battlefield Forge deals 1 damage to you.
Beacon of Destruction deals 5 damage to any target. Shuffle Beacon of Destruction into its owner's library.
Double target player's life total. Shuffle Beacon of Immortality into its owner's library.
Put target artifact or creature card from a graveyard onto the battlefield under your control. Shuffle Beacon of Unrest into its owner's library.
Flash (You may cast this spell any time you could cast an instant.)
T: Add one mana of any color.
Enchanted creature gets +1/+1 for each Forest you control.
Blaze deals X damage to any target.
R, Sacrifice Bloodfire Colossus: Bloodfire Colossus deals 6 damage to each creature and each player.
Bloodrock Cyclops attacks each combat if able.
Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
When Bogardan Firefiend dies, it deals 2 damage to target creature.
Return target permanent to its owner's hand.
Sacrifice Bottle Gnomes: You gain 3 life.
T: Add G or W. Brushland deals 1 damage to you.
Counter target spell.
Reach (This creature can block creatures with flying.)
T: Add W or B. Caves of Koilos deals 1 damage to you.
Whenever Cephalid Constable deals combat damage to a player, return up to that many target permanents that player controls to their owner's hand.
X: Chimeric Staff becomes an X/X Construct artifact creature until end of turn.
Prevent all damage that would be dealt to Cho-Manno, Revolutionary.
1, T, Sacrifice Chromatic Star: Add one mana of any color.
When Chromatic Star is put into a graveyard from the battlefield, draw a card.
X, T: Search your library for a creature card with converted mana cost X or less, reveal it, and put it into your hand. Then shuffle your library.
When Civic Wayfinder enters the battlefield, you may search your library for a basic land card, reveal it, and put it into your hand. If you do, shuffle your library.
You may have Clone enter the battlefield as a copy of any creature on the battlefield.
Cloud Elemental can block only creatures with flying.
Cloud Sprite can block only creatures with flying.
Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)
Colossus of Sardia doesn't untap during your untap step.
9: Untap Colossus of Sardia. Activate this ability only during your upkeep.
Look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
Sacrifice Composite Golem: Add WUBRG.
Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.
Cone of Flame deals 1 damage to any target, 2 damage to another target, and 3 damage to a third target.
Spend only black mana on X.
Consume Spirit deals X damage to any target and you gain X life.
Whenever enchanted creature attacks or blocks, its controller loses 3 life.
Draw two cards.
T: Target creature with power 2 or less can't be blocked this turn.
Destroy target artifact, enchantment, or land.
You may play land cards from your graveyard.
Target opponent sacrifices a creature.
Destroy target Plains or Island. Cryoclasm deals 3 damage to that land's controller.
Destroy target green or white creature.
Enchanted creature doesn't untap during its controller's untap step.
Tap all creatures without flying.
Destroy target artifact or land.
Whenever a player casts a black spell, you may gain 1 life.
Destroy target enchantment.
When Denizen of the Deep enters the battlefield, return each other creature you control to its owner's hand.
Search your library for a card and put that card into your hand. Then shuffle your library.
Counter target spell. Look at the top four cards of your library, then put them back in any order.
Target player reveals their hand. You choose a nonland card from it. That player discards that card.
B, T, Sacrifice Doomed Necromancer: Return target creature card from your graveyard to the battlefield.
3, T: Double the amount of each type of unspent mana you have.
5RR: Create a 5/5 red Dragon creature token with flying. (It can't be blocked except by creatures with flying or reach.)
Whenever a player casts a red spell, you may gain 1 life.
At the beginning of each player's upkeep, that player puts the top X cards of their library into their graveyard, where X is the number of cards in their hand.
B: Regenerate Drudge Skeletons. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)
1R: Target creature can't block Duct Crawler this turn.
Elven Riders can't be blocked except by Walls and/or creatures with flying.
Whenever Elvish Berserker becomes blocked, it gets +1/+1 until end of turn for each creature blocking it.
Other Elf creatures get +1/+1 and have forestwalk. (They can't be blocked as long as defending player controls a Forest.)
G, T: You may put a creature card from your hand onto the battlefield.
Essence Drain deals 3 damage to any target and you gain 3 life.
Return all creatures to their owners' hands.
Faerie Conclave enters the battlefield tapped.
T: Add U.
1U: Faerie Conclave becomes a 2/1 blue Faerie creature with flying until end of turn. It's still a land.
Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)
T: Femeref Archers deals 4 damage to target attacking creature with flying.
When Festering Goblin dies, target creature gets -1/-1 until end of turn.