msem-instigator

At the beginning of combat on your turn, target creature you control has base power and toughness 5/5 until end of turn.

Haste
{2}{U}: Copy target instant or sorcery spell you control. You may choose new targets for the copy. Activate only if you attacked with a Pirate or Rogue this turn.

Whenever you cast a noncreature spell, Pirates and Rogues you control get +1/+0 and gain trample until end of turn.
Whenever this creature deals combat damage to a player, you may sacrifice it. If you do, return target instant or sorcery card from your graveyard to your hand.

Flash
Lifelink
When this creature enters, counter target spell unless its controller pays {1} or 3 life.

Flying
Belmord can't block.
{1}{B}: Create a 1/1 black Bat creature token with flying and “This creature can't block.” Activate only if a player gained or lost life this turn and only once each turn.

Whenever Benevolent Host attacks, if you control another Angel or Nephilim, Benevolent Host gains flying until end of turn. Surveil 1.

Flying
When Benevolent Malach enters, create a 1/1 colorless Construct artifact creature token.
Sacrifice Benevolent Malach: Artifacts you control gain indestructible until end of turn.

When Benign Whisper enters, return another target creature to its owner's hand.

Armed — Beragnian Blacksmith can't attack unless it's equipped.
When Beragnian Blacksmith enters, you may pay {2}. If you do, arm it. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to this creature.)

When Bioluminescent Predator dies, draw a card, then you may put a land card from your hand onto the battlefield.

Flying
Bird of Many Feathers can block only creatures with flying.
Whenever you scry, put a +1/+1 counter on Bird of Many Feathers.

Whenever Birthing Elemental or another nontoken creature you control dies, create a 1/1 green Saproling creature token.

Desecrate (When this creature enters, you may sacrifice an artifact or land.)
When Bitter Wanderer desecrates a permanent, each opponent loses 2 life and you gain 2 life.

When Bjarndyr Militant enters, return target Aura card or card with fabled from your graveyard to your hand.

When Bjarndyr Outfitter enters, arm up to two target creatures you control. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

Lifelink
When Black Curtain Enforcer enters, you may return target creature card with mana value 3 or less from your graveyard to your hand.

Menace
When Blackmoat Bully dies, put a +1/+1 counter and a menace counter on target creature you control.

When Blacksite Moderator enters, you may pay 2 life or sacrifice a permanent. If you do, draw a card.

Lifelink
{T}, Pay 4 life or sacrifice another permanent: Draw a card.

Engage (This creature must be blocked each combat if able.)
Whenever Blade of Fretport becomes blocked by a creature, Blade of Fretport deals 1 damage to that creature.

First strike, vigilance

{1}{R/W}: Untap Blade of the Long Night.

When Blazeblade Sergeant enters, adjudicate. (Create a white Aura enchantment token with enchant creature and “Sacrifice this token: Untap enchanted creature” attached to target creature.)
Whenever an Aura you control enters, target creature you control gains first strike until end of turn.

When Bleak Gorge Convoy enters, you may search your library for a Desert card, put it onto the battlefield tapped, then shuffle.

When this creature enters, create a 1/1 white Peasant creature token.
{W}, {T}: Tap target creature with power X or less, where X is the number of creatures you control.