Target creature gets +3/+2 and gains trample until end of turn.

Endgame
Bodyguard Bruisers gets +2/+2 as long as you're in your endgame.

{3}, {T}, Sacrifice Bonewhisper Idol: It deals 3 damage to target creature.

{1}, Sacrifice another creature: Add the top card of your library to your evil plan.

Destroy target artifact creature or creature with flying.

Counter target spell unless its controller pays {2}.
Invoke {3}{U}

Once each turn, when you play a card from anywhere but your hand, you may create a tapped Treasure token.
{2}{R}: Level 2
At the beginning of your upkeep, exile the top card of your library. You may play that card this turn.
{3}{R}: Level 3
Whenever another permanent you control leaves the battlefield, this Class deals 1 damage to any target.

{T}: Surveil 1. Activate only as a sorcery.

Braise deals 5 damage to target creature or planeswalker. When it dies this turn, its controller creates a Food token.

Brass Laborer enters with two reach counters on it.

Lifelink, haste
Whenever you cast a spell, if Braveheart Charger is attacking, creatures you control get +1/+1 until end of turn.

Target attacking creature gets +3/+3 until end of turn. Put a trample counter on that creature.

Haste
Whenever you amp it up, put a +1/+1 counter on Breakbot. It gains first strike until end of turn.

Spells cost {1} more to cast for each colored mana symbol in their mana cost beyond the first.

You may cast this spell by paying {1}{R}{R} and exiling X cards with flashback from your graveyard rather than paying its mana cost.
Bring Down the Sky deals X damage to each creature and each planeswalker.

Devoid
Flying
Colorless permanents you control have “Whenever this permanent becomes the target of a spell for the first time each turn, counter that spell.”

Choose one or both —
• Brink of the End deals X damage to target creature or planeswalker.
• Target player loses X life.

Whenever another creature enters the battlefield under your control, Broken Steelbeak gains flying until end of turn.

Whenever Brot, Head Honcho or another Minion you control dies, you draw a card and lose 1 life.

This spell costs {1} less to cast if you've cast another spell that targeted a creature this turn.
Target creature you control gets +4/+4 until end of turn.

This spell costs {4} more to cast if it's your turn.
Return target nonland permanent to its owner's hand. If it's your turn, return up to two target nonland permanents to their owners' hands instead.

Target creature gets +3/+1 and gains trample until end of turn.

Experience
When Budding Companion has three or more +1/+1 counters on it, remove them all and transform it.

Destroy target creature with flying.

Counter target spell unless its controller pays {2}. Until end of turn, spells your opponents cast cost {1} more to cast.