Flying

At the beginning of your upkeep, mill a card.

Threshold — As long as seven or more cards are in your graveyard, Bloodcurdler gets +1/+1 and has "At the beginning of your end step, exile two cards from your graveyard."

As long as you control an enchantment, Blood-Cursed Knight gets +1/+1 and has lifelink. (Damage dealt by this creature also causes you to gain that much life.)

, Sacrifice Bloodfire Colossus: It deals 6 damage to each creature and each player.

Bloodfire Enforcers has first strike and trample as long as an instant card and a sorcery card are in your graveyard.

Enchant creature you control

, Sacrifice enchanted creature: Bloodfire Infusion deals damage equal to the sacrificed creature's power to each creature.

, : Draw a card, then discard a card.

Equipped creature gets +2/+0.

Whenever equipped creature deals combat damage to a player, create a token that's a copy of Bloodforged Battle-Axe.

Equip

Whenever Bloodhall Priest enters or attacks, if you have no cards in hand, Bloodhall Priest deals 2 damage to any target.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Flying

When Bloodhunter Bat enters, target player loses 2 life and you gain 2 life.

When the names of three or more nonland permanents begin with the same letter, sacrifice Bloodletter. If you do, it deals 2 damage to each creature and each player.

, , Put a blood counter on Bloodletter Quill: Draw a card, then you lose 1 life for each blood counter on Bloodletter Quill.

: Remove a blood counter from Bloodletter Quill.

Lifelink

When Bloodline Necromancer enters, you may return target Vampire or Wizard creature card from your graveyard to the battlefield.

Bloodthirst 3 (If an opponent was dealt damage this turn, this creature enters with three +1/+1 counters on it.)

Flying

Whenever you cast a Vampire creature spell, it gains bloodthirst 3.

Whenever Bloodmad Vampire deals combat damage to a player, put a +1/+1 counter on it.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Whenever Bloodmist Infiltrator attacks, you may sacrifice another creature. If you do, Bloodmist Infiltrator can't be blocked this turn.

When Bloodrage Alpha enters the battlefield, choose one —

• Another target Wolf or Werewolf you control fights target creature you don't control.

• When you cast your next Wolf or Werewolf spell, it gains "When this creature enters the battlefield, it fights up to one target creature you don't control."

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters with a +1/+1 counter on it.)

Bloodrock Cyclops attacks each combat if able.

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters with a +1/+1 counter on it.)

: Bloodshot Trainee deals 4 damage to target creature. Activate only if Bloodshot Trainee's power is 4 or greater.

, Pay 2 life, Discard a card, Sacrifice a creature: Create a 5/5 black Demon creature token with flying. Activate only as a sorcery.

Devour 1 (As this enters, you may sacrifice any number of creatures. This creature enters with that many +1/+1 counters on it.)

Each other creature you control enters with an additional X +1/+1 counters on it, where X is the number of +1/+1 counters on Bloodspore Thrinax.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Bloodstoke Howler is turned face up, Beast creatures you control get +3/+0 until end of turn.

, Discard a card: Bloodsworn Squire gains indestructible until end of turn. Tap it. Then if there are four or more creature cards in your graveyard, transform Bloodsworn Squire. (Damage and effects that say "destroy" don't destroy it.)

Flying, trample

Whenever Bloodthirster deals combat damage to a player, untap it. After this phase, there is an additional combat phase.

Bloodthirster can't attack a player it has already attacked this turn.

Flying

Whenever you gain life, put a +1/+1 counter on Bloodthirsty Aerialist.

: Put a devotion counter on Bloodthirsty Ogre.

: Target creature gets -X/-X until end of turn, where X is the number of devotion counters on Bloodthirsty Ogre. Activate only if you control a Demon.

Haste

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

Flying

When Bloodtithe Collector 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.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")

Blooming Marsh enters tapped unless you control two or fewer other lands.

: Add or .

Trample

, : You get (a ticket counter).

Reach

When Blossom Prancer enters, look at the top five cards of your library. You may reveal a creature or enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. If you didn't put a card into your hand this way, you gain 4 life.

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.

Blow Off Steam deals 1 damage to any target. (Then exile this card. You may cast the creature later from exile.)

Each noncreature, non-Equipment artifact is an Equipment with equip and "Equipped creature gets +X/+0," where X is that artifact's mana value.

, : Put a charge counter on Blue Mana Battery.

, Remove any number of charge counters from Blue Mana Battery: Add , then add an additional for each charge counter removed this way.

Enchant creature

Enchanted creature can't be blocked by blue creatures.

Enchanted creature gets +2/+2 as long as an opponent controls a blue permanent.

Partner with Owen Grady, Raptor Trainer (When this creature enters, target player may put Owen into their hand from their library, then shuffle.)

For each kind of counter on Blue, Loyal Raptor, each other Dinosaur you control enters with a counter of that kind on it.

Exile target creature you control, then return that card to the battlefield under its owner's control.

Draw a card.

Sliver creatures you control have haste. (They can attack and as soon as they come under your control.)

Blurry (This creature can be blocked only if defending player was wearing glasses as it was cast.)

Whenever Blurry Beeble deals combat damage to a player, you may draw a card. If you do, discard a card.

: Boa Constrictor gets +3/+3 until end of turn.

Look at the top five cards of your library. You may reveal a historic card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. (Artifacts, legendaries, and Sagas are historic.)

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.

Deathtouch

Whenever another nontoken creature you control dies, Body Launderer connives.

When Body Launderer dies, return another target non-Rogue creature card with equal or lesser power from your graveyard to the battlefield.

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.