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

First strike (This creature deals combat damage before creatures without first strike.)

Blood Petal Celebrant has first strike as long as it's attacking.

When Blood Petal Celebrant dies, create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")

Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life.

, Sacrifice a creature: Blood Rites deals 2 damage to any target.

Whenever a creature enters the battlefield under an opponent's control, you may have that player lose 1 life.

When Blood Spatter Analysis enters the battlefield, it deals 3 damage to target creature an opponent controls.

Whenever one or more creatures die, mill a card and put a bloodstain counter on Blood Spatter Analysis. Then sacrifice it if it has five or more bloodstain counters on it. When you do, return target creature card from your graveyard to your hand.

Kicker—Tap an untapped Vampire you control. (You may tap a Vampire you control in addition to any other costs as you cast this spell.)

Target opponent loses half their life, rounded up. If this spell was kicked, you gain life equal to the life lost this way.

Flying

At the beginning of combat on your turn, up to one target Blood token you control becomes a 2/2 black Bat creature with flying and haste in addition to its other types.

Whenever a player casts a creature spell, each player returns all cards with the same name as that spell from their graveyard to the battlefield.

Assist (Another player can pay up to of this spell's cost.)

When Bloodborn Scoundrels enters the battlefield, target opponent loses 2 life and you gain 2 life.

Bloodbraid Marauder can't block.

Delirium — This spell has cascade as long as there are four or more card types among cards in your graveyard. (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.)

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

Destroy target creature or planeswalker with mana value 2 or less. If this spell was kicked, instead destroy target creature or planeswalker.

Bloodcrazed Goblin can't attack unless an opponent has been dealt damage this turn.

Bloodcrazed Neonate attacks each combat if able.

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

Menace

When Bloodcrazed Socialite enters the battlefield, create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")

Whenever Bloodcrazed Socialite attacks, you may sacrifice a Blood token. If you do, it gets +2/+2 until end of turn.

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 the battlefield 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 the battlefield, 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 the battlefield, 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 the battlefield 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 the battlefield with a +1/+1 counter on it.)

Bloodrock Cyclops attacks each combat if able.

Enchant creature

Enchanted creature attacks each combat if able.

Whenever you cast your second spell each turn, put two +1/+1 counters on Bloodsky Berserker. It gains menace until end of turn. (It can't be blocked except by two or more creatures.)

At the beginning of your end step, if you gained life this turn, create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")

: Each opponent loses 2 life and you gain 2 life.

, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

Bloodsworn Knight's power and toughness are each equal to the number of creature cards in your graveyard.

, Discard a card: Bloodsworn Knight gains indestructible until end of turn. Tap it. (Damage and effects that say "destroy" don't destroy it.)

Flying

Commander creatures you control get +2/+2 and have haste.

Haste

When Bloodthirsty Adversary enters the battlefield, 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.

Equipped creature gets +2/+0 and is goaded. (It attacks each combat if able and attacks a player other than you if able.)

: Attach Bloodthirsty Blade to target creature an opponent controls. Activate only as a sorcery.

Equipped creature gets +2/+1.

Equip—Pay or discard a card.

Sacrifice a creature: Bloodthrone Vampire gets +2/+2 until end of turn.

When Bloodtithe Harvester enters the battlefield, create a Blood token. (It's an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")

, Sacrifice Bloodtithe Harvester: Target creature gets -X/-X until end of turn, where X is twice the number of Blood tokens you control. Activate only as a sorcery.

Flying

, Pay 2 life: Put a +1/+1 counter on Bloodtracker.

When Bloodtracker leaves the battlefield, draw a card for each +1/+1 counter on it.

Flying

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Bloodwater Entity enters the battlefield, you may put target instant or sorcery card from your graveyard on top of your library.

: For each color among permanents you control, add one mana of that color.

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.)