msem-instigator

Blazing Volley deals 1 damage to each creature your opponents control.

({T}: Add {U}, {B}, or {R}.)
Bleak Dominion enters the battlefield tapped.

When Blessed Spellroot dies, you gain 5 life.

When Blightbringer enters the battlefield, creatures your opponents control get -1/-1 until end of turn.
Unearth {3}{B} ({3}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)

Vision (Whenever this or another creature enters the battlefield under your control, reveal the top card of your library. Then you may put that card into your graveyard.)
Whenever Blind Soulcaller envisions an instant or sorcery card, you may tap target permanent.

Cycling {2} ({2}, Discard this card: Draw a card.)
{3}{B}{B}, Exile Bloated Visceroid from your graveyard: Create two 2/2 black Zombie creature tokens. Activate only as a sorcery.

Whenever Blood Artist or another creature dies, target player loses 1 life and you gain 1 life.

Target creature gets +3/-3 until end of turn.
Kindle 3—{B}{R}, Pay 3 life. ({B}{R}, Pay 3 life, Exile this card from your graveyard: Create three 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

Nonbasic lands have “Whenever this land becomes tapped, you lose 1 life unless you sacrifice this land.”

When Blood Jade Prophet enters the battlefield, reveal the top three cards of your library. For each card revealed this way, you may pay 3 life. If you do, put that card into your hand. Otherwise, put it into your graveyard.

Bloodfell Caves enters the battlefield tapped.
When Bloodfell Caves enters the battlefield, you gain 1 life.
{T}: Add {B} or {R}.

Bloodleaf Butcher gets +1/+0 and has deathtouch as long as five or more cards are in your graveyard.

{G}, {T}: Put a +1/+1 counter on Bloodleaf Tracker for each creature that entered the battlefield this turn.

({T}: Add {R}.)
Bloodriver enters the battlefield tapped.
When Bloodriver enters the battlefield, target creature you control gains haste until end of turn.

When Bloodsoaked Blades enters the battlefield, creatures you control get +2/+0 until end of turn.
Equipped creature gets +1/+1.
Equip {1}

Align X (Choose modes with total ★ less than or equal to X. You may choose modes multiple times.)
• ★ — Bloodstained Calamity deals 1 damage to each creature, player, and planeswalker.
• ★★ — Return target instant or sorcery card from your graveyard to your hand. Exile Bloodstained Calamity.
• ★★★★★ — Bloodstained Calamity deals 10 damage to any target.

Target creature you control gets +2/+2 and gains hexproof until end of turn.

Blossoming Sands enters the battlefield tapped.
When Blossoming Sands enters the battlefield, you gain 1 life.
{T}: Add {G} or {W}.

You may have Blurry Counterpart enter the battlefield as a copy of any creature on the battlefield.
Mirage {1}{U} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Target creature gets +2/+2 until end of turn.
Fuse (You may cast one or both halves of this card from your hand.)

When target creature dies this turn, return it to the battlefield under its owner's control. When you do, germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

Whenever another creature enters the battlefield under your control, you may have it gain haste. If you do, return it to its owner's hand at the beginning of the next end step.

({T}: Add {U} or {R}.)
Boiling Ridge enters the battlefield tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

As an additional cost to cast this spell, sacrifice a creature.
Destroy target creature.

Boneyard Pass enters the battlefield tapped unless you control a basic land.
{T}: Add {W} or {B}.