Gatecrash

Boros Guildgate enters the battlefield tapped. {T}: Add {R} or {W}.

Defender 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.)

{T}: Untap target Gate.

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

Return target creature card from your graveyard to your hand. Cipher (Then you may exile this spell card encoded on a creature you control. Wheneve...

Target player sacrifices a creature, then gains life equal to that creature's toughness.

Dimir Guildgate enters the battlefield tapped. {T}: Add {U} or {B}.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)

Counter target spell. Its controller mills two cards.

Destroy target artifact or enchantment.

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.)

Exile target artifact.

{W}: Towering Thunderfist gains vigilance until end of turn.

Ember Beast can't attack or block alone.

Counter target noncreature spell. Draw a card.

Target player mills three cards. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat ...

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

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.)

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

Deathcult Rogue can't be blocked except by Rogues.

Bloodrush — {1}{R}{G}, Discard Zhur-Taa Swine: Target attacking creature gets +5/+4 until end of turn.