Flash

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

Enchanted creature gets +4/+2.

When Boonweaver Giant enters the battlefield, you may search your graveyard, hand, and/or library for an Aura card and put it onto the battlefield attached to Boonweaver Giant. If you search your library this way, shuffle.

Boot Nipper enters the battlefield with your choice of a deathtouch counter or a lifelink counter on it.

Equipped creature gets +1/+0 and has haste.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

Whenever Borborygmos and Fblthp enters the battlefield or attacks, draw a card, then you may discard any number of land cards. When you discard one or more cards this way, Borborygmos and Fblthp deals twice that much damage to target creature.

: Put Borborygmos and Fblthp into its owner's library third from the top.

Vigilance

When Borderland Explorer enters the battlefield, each player may discard a card. Each player who discarded a card this way may search their library for a basic land card, reveal it, put it into their hand, then shuffle.

: Boreal Centaur gets +1/+1 until end of turn. Activate only once each turn. ( can be paid with one mana from a snow source.)

Flying

Spells your opponents cast that target Boreal Elemental cost more to cast.

Whenever you cast a creature spell, if of any of that spell's colors was spent to cast it, that creature enters the battlefield with an additional +1/+1 counter on it. ( is mana from a snow source.)

Flying

When Boreas Charger leaves the battlefield, choose an opponent who controls more lands than you. Search your library for a number of Plains cards equal to the difference, reveal those cards, put one of them onto the battlefield tapped and the rest into your hand, then shuffle.

Enchant artifact or creature

As long as enchanted permanent is a creature, it gets +1/+1 for each creature and/or Vehicle you control.

Channel — , Discard Born to Drive: Create two 1/1 colorless Pilot creature tokens with "This creature crews Vehicles as though its power were 2 greater."

Whenever Boromir, Gondor's Hope enters the battlefield or attacks, look at the top six cards of your library. You may reveal a Human or artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

At the beginning of each combat, up to one target creature attacks or blocks this combat if able and up to one target creature can't attack or block this combat.

Choose one —

• Boros Charm deals 4 damage to target player or planeswalker.

• Permanents you control gain indestructible until end of turn.

• Target creature gains double strike until end of turn.

Battalion — Whenever Boros Elite and at least two other creatures attack, Boros Elite gets +2/+2 until end of turn.

Boros Garrison enters the battlefield tapped.

When Boros Garrison enters the battlefield, return a land you control to its owner's hand.

: Add .

: Target creature gains haste until end of turn.

: Target creature gains first strike until end of turn.

: Add or .

, , Sacrifice Boros Locket: Draw two cards.

Whenever Boros Reckoner is dealt damage, it deals that much damage to any target.

: Boros Reckoner gains first strike until end of turn.

, : Add .

Double strike

Escalate (Pay this cost for each mode chosen beyond the first.)

Choose one or both —

• Target creature gets +3/+0 until end of turn.

• Target creature gains first strike until end of turn.

When Borrowed Time enters the battlefield, exile target nonland permanent an opponent controls until Borrowed Time leaves the battlefield.

Borrowing the East Wind deals X damage to each creature with horsemanship and each player.

When Boseiju Pathlighter enters the battlefield, draft a card from Boseiju Pathlighter's spellbook.

: Add .

Channel — , Discard Boseiju, Who Endures: Destroy target artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle. This ability costs less to activate for each legendary creature you control.

Trample

, Sacrifice an artifact: Bosh, Iron Golem deals damage equal to the sacrificed artifact's mana value to any target.

Treefolk spells and Shaman spells you cast cost less to cast.

Boss's Chauffeur enters the battlefield with a number of +1/+1 counters on it equal to one plus the number of other creatures you control.

Alliance — Whenever another creature enters the battlefield under your control, put a +1/+1 counter on Boss's Chauffeur.

When Boss's Chauffeur dies, create a 1/1 green and white Citizen creature token for each +1/+1 counter on it.

Botanical Plaza enters the battlefield tapped.

: Add or .

, , Sacrifice Botanical Plaza: Draw a card.

Create three 1/1 colorless Thopter artifact creature tokens with flying. Surveil 2.

Sacrifice Bottle Gnomes: You gain 3 life.

, Sacrifice Bottle of Suleiman: Flip a coin. If you win the flip, create a 5/5 colorless Djinn artifact creature token with flying. If you lose the flip, Bottle of Suleiman deals 5 damage to you.

At the beginning of each opponent's upkeep, exile all cards from your hand face down.

At the beginning of your upkeep, return all cards you own exiled with Bottled Cloister to your hand, then draw a card.

Bottomless Vault enters the battlefield tapped.

You may choose not to untap Bottomless Vault during your untap step.

At the beginning of your upkeep, if Bottomless Vault is tapped, put a storage counter on it.

, Remove any number of storage counters from Bottomless Vault: Add for each storage counter removed this way.

Surge (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)

Boulder Salvo deals 4 damage to target creature.

Boulderfall deals 5 damage divided as you choose among any number of targets.

Visit — Return a creature you don't control with the lowest toughness among creatures you don't control to its owner's hand. (If multiple creatures are tied, choose any one of them.)

Lights — 2, 6

Visit — Return a creature you don't control with the lowest toughness among creatures you don't control to its owner's hand. (If multiple creatures are tied, choose any one of them.)

Lights — 4, 6

This spell costs less to cast if it targets a black permanent.

Bouncer's Beatdown deals X damage to target creature or planeswalker, where X is the greatest power among creatures you control. If that creature or planeswalker would die this turn, exile it instead.

Sacrifice a creature. Return up to X cards from your graveyard to your hand, where X is the number of colors that creature was. Exile this card.

Enchant permanent

Enchanted permanent can't attack, block, or crew Vehicles, and its activated abilities can't be activated unless they're mana abilities.

At the beginning of combat on your turn, if you control a creature with power 4 or greater, you may discard a card. If you do, draw a card.

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

When Bounding Krasis enters the battlefield, you may tap or untap target creature.

Search your library for up to X basic land cards, where X is the number of lands you control, put them onto the battlefield tapped, then shuffle.

You gain 1 life for each land you control.

Vigilance

, Sacrifice Bounty Agent: Destroy target legendary permanent that's an artifact, creature, or enchantment.