Vigilance

Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.

Sacrifice Boromir, Warden of the Tower: Creatures you control gain indestructible until end of turn. The Ring tempts you.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

: Boros Challenger gets +1/+1 until end of turn.

: Add or .

, , Sacrifice Boros Cluestone: Draw a card.

Prevent all combat damage that would be dealt by target attacking or blocking creature this turn. If was spent to cast this spell, Boros Fury-Shield deals damage to that creature's controller equal to the creature's power.

Boros Guildgate enters the battlefield tapped.

: Add or .

: Add or .

: Boros Keyrune becomes a 1/1 red and white Soldier artifact creature with double strike until end of turn. (It deals both first-strike and regular combat damage.)

Battalion — Whenever Boros Mastiff and at least two other creatures attack, Boros Mastiff gains lifelink until end of turn. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

( can be paid with either or .)

First strike

Battalion — Whenever Boros Strike-Captain and at least two other creatures attack, exile the top card of your library. During any turn you attacked with three or more creatures, you may play that card.

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

Choose one or both —

• Creatures you control get +2/+0 until end of turn.

• Creatures you control get +0/+2 until end of turn.

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

Choose one or both —

• Target creature gets +1/+1 until end of turn.

• Target creature gets -1/-1 until end of turn.

Draw a card for each tapped creature target opponent controls.

Domain — When Bortuk Bonerattle enters the battlefield, if you cast it, choose target creature card in your graveyard. Return that card to the battlefield if its mana value is less than or equal to the number of basic land types among lands you control. Otherwise, put it into your hand.

(As this Saga enters and after your draw step, add a lore counter.)

I — Search your library for up to two basic Forest cards, reveal them, put them into your hand, then shuffle.

II — Put up to one target land card from your graveyard on top of your library.

III — Exile this Saga, then return it to the battlefield transformed under your control.

Boseiju, Who Shelters All enters the battlefield tapped.

, Pay 2 life: Add . If that mana is spent on an instant or sorcery spell, that spell can't be countered.

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.

: Put a bounty counter on target nonblack creature.

: Destroy target creature with a bounty counter on it.

Reveal the top six cards of your library. You may put a land card from among them onto the battlefield tapped and an Elf card from among them into your hand. Put the rest on the bottom of your library in a random order.

You may exile a green card from your hand rather than pay this spell's mana cost.

Distribute three +1/+1 counters among one, two, or three target creatures. For each +1/+1 counter you put on a creature this way, remove a +1/+1 counter from that creature at the beginning of the next cleanup step.

Destroy target artifact or creature. Its controller creates a 2/2 white Ox creature token.

Creatures with flying can't block creatures you control.

Whenever a creature enters the battlefield under your control, it fights up to one target creature you don't control with the same mana value.

: Create a Treasure token. Activate only if you control a creature that fought this turn.

Choose one or both —

• Branching Bolt deals 3 damage to target creature with flying.

• Branching Bolt deals 3 damage to target creature without flying.

Flash

Flying

Brazen Borrower can block only creatures with flying.

Sacrifice Brindle Boar: You gain 4 life.

Enchant creature

Whenever Brinebound Gift enters the battlefield or enchanted creature becomes the target of an Aura spell, create a 1/1 white Spirit creature token with flying.

If Brinebound Gift would be put into a graveyard from anywhere, exile it instead.

Menace, haste

Boast — Sacrifice another creature or artifact: Broadside Bombardiers deals damage equal to 2 plus the sacrificed permanent's mana value to any target. (Activate only if this creature attacked this turn and only once each turn.)

When a player other than Bronze Bombshell's owner controls it, that player sacrifices it. If the player does, Bronze Bombshell deals 7 damage to the player.

Whenever Bruse Tarl, Boorish Herder enters the battlefield or attacks, target creature you control gains double strike and lifelink until end of turn.

Partner (You can have two commanders if both have partner.)

This spell costs less to cast if it targets an attacking creature.

Put target creature into its owner's library second from the top.

As Canker Abomination enters the battlefield, choose an opponent. Canker Abomination enters the battlefield with a -1/-1 counter on it for each creature that player controls.