Gatecrash

Flying Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)

Battalion — Whenever Warmind Infantry and at least two other creatures attack, Warmind Infantry gets +2/+0 until end of turn.

Sacrifice another creature: Cartel Aristocrat gains protection from the color of your choice until end of turn.

Defender Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature,...

Whenever Slate Street Ruffian becomes blocked, defending player discards a card.

Creatures you control have haste and attack each combat if able.

Whenever another red creature enters the battlefield under your control, Foundry Street Denizen gets +1/+0 until end of turn.

Battalion — Whenever Daring Skyjek and at least two other creatures attack, Daring Skyjek gains flying until end of turn.

Battalion — Whenever Firefist Striker and at least two other creatures attack, target creature can't block this turn.

Ember Beast can't attack or block alone.

Battalion — Whenever Bomber Corps and at least two other creatures attack, Bomber Corps deals 1 damage to any target.

{X}{R}, {T}, Sacrifice Cinder Elemental: It deals X damage to any target.

Wight of Precinct Six gets +1/+1 for each creature card in your opponents' graveyards.

{1}, Sacrifice a creature: Target player reveals cards from the top of their library until they reveal a land card, then puts those cards into thei...

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)

Whenever another white creature enters the battlefield under your control, tap target creature an opponent controls.

Flying Creatures with flying your opponents control get -1/-1.

Whenever another black creature enters the battlefield under your control, target creature gains intimidate until end of turn. (It can't be blocked...

Whenever another nontoken creature dies, you may create a 1/1 black Rat creature token. Rats you control have deathtouch.

{U}: Horror of the Dim gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

{B}: Gateway Shade gets +1/+1 until end of turn. Tap an untapped Gate you control: Gateway Shade gets +2/+2 until end of turn.

Defender Sacrifice another creature: Corpse Blockade gains deathtouch until end of turn.

Flying When Balustrade Spy enters the battlefield, target player reveals cards from the top of their library until they reveal a land card, then pu...