Haste

When Bloodthirsty Adversary enters, you may pay any number of times. When you pay this cost one or more times, put that many +1/+1 counters on Bloodthirsty Adversary, then exile up to that many target instant and/or sorcery cards with mana value 3 or less from your graveyard and copy them. You may cast any number of the copies without paying their mana costs.

Flying, deathtouch

Whenever an opponent loses life, you gain that much life. (Damage causes loss of life.)

Haste

: Target creature with power 5 or greater gains haste until end of turn.

Flying

When this creature enters, if an opponent lost life this turn, each opponent discards a card.

Flying

When Blood-Toll Harpy enters, each player loses 1 life.

Flying, trample

Whenever an opponent casts a spell, that player creates a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")

Whenever Bloodvial Purveyor attacks, it gets +1/+0 until end of turn for each Blood token defending player controls.

When Bloom Hulk enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

At the beginning of your end step, put a +1/+1 counter on target creature you control.

: Untap target land.

: Add two mana of any one color.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Whenever Blossoming Tortoise enters or attacks, mill three cards, then return a land card from your graveyard to the battlefield tapped.

Activated abilities of lands you control cost less to activate.

Land creatures you control get +1/+1.

Flying

Lightning Breath — When Blue Dragon enters, until your next turn, target creature an opponent controls gets -3/-0, up to one other target creature gets -2/-0, and up to one other target creature gets -1/-0.

: An opponent tells you a statement about themselves and secretly notes whether it's true or false. You guess which it is. If you guessed correctly, Blufferfish gets +2/+0 and can't be blocked this turn.

This spell can't be countered.

Shroud (This creature can't be the target of spells or abilities.)

When Blurry Visionary enters the battlefield, look at the top two cards of your library and put them back-to-back in the same sleeve with either card in front. They become a modal double-faced card for the rest of the game. Then put that card into your hand. (You can play either face of that double-faced card. Make sure to reset it when the game ends.)

Haste

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Trample

Other red creatures you control get +1/+1.

Other green creatures you control get +1/+1.

Whenever you sacrifice another creature, put a +1/+1 counter on Body Dropper.

, Sacrifice another creature: Body Dropper gains menace until end of turn. (It can't be blocked except by two or more creatures.)

Trample

Soulshift 8 (When this creature dies, you may return target Spirit card with mana value 8 or less from your graveyard to your hand.)

When Body Snatcher enters, exile it unless you discard a creature card.

When Body Snatcher dies, exile it and return target creature card from your graveyard to the battlefield.

Protection from white

At the beginning of your upkeep, sacrifice Bog Elemental unless you sacrifice a land.

Whenever a player casts a black spell, Bog Gnarr gets +2/+2 until end of turn.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Flying

, Sacrifice a Food: Target creature gets -3/-3 until end of turn.

Bog Rats can't be blocked by Walls.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

, , Discard a card: Add .

Sacrifice another creature: Until end of turn, Bogardan Dragonheart becomes a Dragon with base power and toughness 4/4, flying, and haste.

Flash

Flying

When Bogardan Hellkite enters, it deals 5 damage divided as you choose among any number of targets.

Flying

When Bogardan Phoenix dies, exile it if it had a death counter on it. Otherwise, return it to the battlefield under your control and put a death counter on it.

, : Search your library for a card named Festering Newt or Bubbling Cauldron, put it onto the battlefield tapped, then shuffle.

Menace (This creature can't be blocked except by two or more creatures.)

When Boggart Harbinger enters, you may search your library for a Goblin card, reveal it, then shuffle and put that card on top.

Champion a Goblin (When this enters, sacrifice it unless you exile another Goblin you control. When this leaves the battlefield, that card returns to the battlefield.)

Whenever a Goblin you control deals combat damage to a player, you may create a 1/1 black Goblin Rogue creature token.

As long as you control a Faerie, Boggart Sprite-Chaser gets +1/+1 and has flying.

When Boilerbilges Ripper enters, you may sacrifice another creature or enchantment. When you do, Boilerbilges Ripper deals 2 damage to any target.

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)

Whenever this creature attacks, tap target artifact or creature an opponent controls.

: Bold Impaler gets +2/+0 until end of turn.

Trample

When Boldwyr Heavyweights enters, each opponent may search their library for a creature card and put it onto the battlefield. Then each player who searched their library this way shuffles.

Double strike, trample

Disguise (You may cast this card face down for as a 2/2 creature with ward . Turn it face up any time for its disguise cost.)

Double <s>breaker</s> strike

While attacking, this creature gets +1<s>000</s> power for each <s>fire</s> red card in your graveyard.

Disguise (You may cast this card face down for as a 2/2 creature with ward . Turn it face up any time for its disguise cost.)

When Boltbender is turned face up, you may choose new targets for any number of other spells and/or abilities.

Haste

Whenever Bomat Courier attacks, exile the top card of your library face down. (You can't look at it.)

, Discard your hand, Sacrifice Bomat Courier: Put all cards exiled with Bomat Courier into their owners' hands.

Battalion — Whenever Bomber Corps and at least two other creatures attack, Bomber Corps deals 1 damage to any target.

Bonded Construct can't attack alone.

: Transform Bonded Herdbeast. Activate only as a sorcery. ( can be paid with either or 2 life.)

Whenever Bone Dancer attacks and isn't blocked, you may put the top creature card of defending player's graveyard onto the battlefield under your control. If you do, Bone Dancer assigns no combat damage this turn.

Whenever you discard a creature card, create a 2/2 black Zombie creature token.

Whenever you discard a land card, add .

Whenever you discard a noncreature, nonland card, draw a card.

Menace (This creature can't be blocked except by two or more creatures.)

When Bone Pit Brute enters, target creature gets +4/+0 until end of turn.