Shambleshark

Creature - Fish Crab

Flash (You may cast this spell any time you could cast an instant.)

Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

Duskmantle Seer

Creature - Vampire Wizard

Flying

At the beginning of your upkeep, each player reveals the top card of his or her library, loses life equal to that card's converted mana cost, then puts it into his or her hand.

Treasury Thrull

Creature - Thrull

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

Whenever Treasury Thrull attacks, you may return target artifact, creature, or enchantment card from your graveyard to your hand.

Rust Scarab

Creature - Insect

Whenever Rust Scarab becomes blocked, you may destroy target artifact or enchantment defending player controls.

"Behold nature's answer to the problem of society."
-Nikya of the Old Ways

Smog Elemental

Creature - Elemental

Flying

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

"The skies used to be my refuge, a place of peace away from the chaos below. Now, with every flight, death seems to follow me like a shadow."
-Writings of Cica, Skyjek scout

Zameck Guildmage

Creature - Elf Wizard

: This turn, each creature you control enters the battlefield with an additional +1/+1 counter on it.

, Remove a +1/+1 counter from a creature you control: Draw a card.

Gutter Skulk

Creature - Zombie Rat

Upon finding his warehouse infested, Gaven didn't know whether to get an exterminator or an exorcist.

Gruul Ragebeast

Creature - Beast

Whenever Gruul Ragebeast or another creature enters the battlefield under your control, that creature fights target creature an opponent controls.

"If the other guilds want a war, they should know we've been ready the whole time."
-Ruric Thar, Ghor-Clan chieftain

Gyre Sage

Creature - Elf Druid

Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

: Add to your mana pool for each +1/+1 counter on Gyre Sage.

Wojek Halberdiers

Creature - Human Soldier

Battalion - Whenever Wojek Halberdiers and at least two other creatures attack, Wojek Halberdiers gains first strike until end of turn.

Tired of Boros interference, the Rakdos unleashed hellraiser goblins, hoping their corpses would weigh down the halberds.

Skarrg Guildmage

Creature - Human Shaman

: Creatures you control gain trample until end of turn.

: Target land you control becomes a 4/4 Elemental creature until end of turn. It's still a land.

Mortus Strider

Creature - Skeleton

When Mortus Strider dies, return it to its owner's hand.

Dimir's best agents hide from death itself.

Elusive Krasis

Creature - Fish Mutant

Elusive Krasis is unblockable.

Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

Sunhome Guildmage

Creature - Human Wizard

: Creatures you control get +1/+0 until end of turn.

: Put a 1/1 red and white Soldier creature token with haste onto the battlefield.

Dutiful Thrull

Creature - Thrull

: Regenerate Dutiful Thrull.

"They are useful, but there's little satisfaction in supplication that throws itself under your heel."
-Jozica, Orzhov enforcer

Merfolk of the Depths

Creature - Merfolk Soldier

Flash (You may cast this spell any time you could cast an instant.)

When giant sinkholes opened across Ravnica, they revealed buried oceans and the merfolk, once thought to be extinct.

Spire Tracer

Creature - Elf Scout

Spire Tracer can't be blocked except by creatures with flying or reach.

Cartographers on Ravnica chart not just the horizontal, but also the vertical.

Deathcult Rogue

Creature - Human Rogue

Deathcult Rogue can't be blocked except by Rogues.

"The hussars can't catch him, and he evades our traps with ease. I fear he walks unseen even in the halls of New Prahv."
-Arrester Lavinia, Tenth Precinct

Luminate Primordial

Creature - Avatar

Vigilance

When Luminate Primordial enters the battlefield, for each opponent, exile up to one target creature that player controls and that player gains life equal to its power.

Assault Griffin

Creature - Griffin

Flying

"Griffins do not serve. They give freely to those they trust."
-Amira, skycaptain of Thune

Zhur-Taa Swine

Creature - Boar

Bloodrush - , Discard Zhur-Taa Swine: Target attacking creature gets +5/+4 until end of turn.

Gurley was the first to domesticate one, though his widow didn't take much solace in that accomplishment.

Drakewing Krasis

Creature - Lizard Drake

Flying, trample

Cautious not to repeat Vig's mistakes, the Simic fuse life essences using magic alone. Each result is called a krasis.

Metropolis Sprite

Creature - Faerie Rogue

Flying

: Metropolis Sprite gets +1/-1 until end of turn.

"Well, if that goblin didn't want his tongue pierced, he shouldn't have stuck it out at me."

Ruination Wurm

Creature - Wurm

When the architects of Ravnica claim a structure will stand against a wurm, they never mention for how long.

Nav Squad Commandos

Creature - Human Soldier

Battalion - Whenever Nav Squad Commandos and at least two other creatures attack, Nav Squad Commandos gets +1/+1 until end of turn. Untap it.

Funded by the Azorius to keep current maps of the undercity, the Boros nav squads survey even the most unsavory areas.

Basilica Guards

Creature - Human Soldier

Defender

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

"None may pass . . . for free."

Molten Primordial

Creature - Avatar

Haste

When Molten Primordial enters the battlefield, for each opponent, gain control of up to one target creature that player controls until end of turn. Untap those creatures. They gain haste until end of turn.

Sepulchral Primordial

Creature - Avatar

Intimidate

When Sepulchral Primordial enters the battlefield, for each opponent, you may put up to one target creature card from that player's graveyard onto the battlefield under your control.

Ivy Lane Denizen

Creature - Elf Warrior

Whenever another green creature enters the battlefield under your control, put a +1/+1 counter on target creature.

"Skyknight gear? Well, I have drake-skin gauntlets, supple and fireproof. Or a ceratok chestplate that'll stop a crossbow bolt."

Cinder Elemental

Creature - Elemental

, , Sacrifice Cinder Elemental: Cinder Elemental deals X damage to target creature or player.

Their rage can grow to such proportions that they explode in a cloud of fire.

Wrecking Ogre

Creature - Ogre Warrior

Double strike

Bloodrush - , Discard Wrecking Ogre: Target attacking creature gets +3/+3 and gains double strike until end of turn.

If no opponent can be found, ogres of the Bolrac Clan will often pick fights with buildings.

Ogre Slumlord

Creature - Ogre Rogue

Whenever another nontoken creature dies, you may put a 1/1 black Rat creature token onto the battlefield.

Rats you control have deathtouch.

"His tenement is filled with the most vile, disgusting vermin. It's infested with rats, too."
-Branko One-Ear

Slate Street Ruffian

Creature - Human Warrior

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

"Merciless to the point of psychosis. Let's give him a job."
-Zelinas, Orzhov recruiter

Warmind Infantry

Creature - Elemental Soldier

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

Before Aurelia denounced Niv-Mizzet, the two guilds had collaborated on the Warmind Initiative in pursuit of the ultimate soldier.

Hellraiser Goblin

Creature - Goblin Berserker

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

Don't let him lead the soldiers, but by all means let him lead the way.

Nightveil Specter

Creature - Specter

Flying

Whenever Nightveil Specter deals combat damage to a player, that player exiles the top card of his or her library.

You may play cards exiled with Nightveil Specter.

Court Street Denizen

Creature - Human Soldier

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

"The Boros fight for justice. The Azorius fight for law. I hold the line between, and make sure the people are given both."

Thrull Parasite

Creature - Thrull

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

, Pay 2 life: Remove a counter from target nonland permanent.

The hunger of a vampire and the subtlety of a tax collector.

Ember Beast

Creature - Beast

Ember Beast can't attack or block alone.

Spot one ember beast, attack.
Spot a second, best fall back.
-Dwarven saying

Skinbrand Goblin

Creature - Goblin Warrior

Bloodrush - , Discard Skinbrand Goblin: Target attacking creature gets +2/+1 until end of turn.

"These Gruul skin-runes-discern whether their patterns evoke streets, leylines, or both. You have four days."
-Niv-Mizzet, to his assistant