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.)
{2}{U}
Aether Channeler
Creature - Human Wizard
When Aether Channeler enters the battlefield, choose one --
• Create a 1/1 white Bird creature token with flying.
• Return another target nonland permanent to its owner's hand.
• Draw a card.
2 /
1
{U}
An Offer You Can't Refuse
Instant
Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")
--
Ancient Tomb
Land
{T}: Add {C}{C}. Ancient Tomb deals 2 damage to you.
{2}
Arcane Signet
Artifact
{T}: Add one mana of any color in your commander's color identity.
{3}
Ashnod's Altar
Artifact
Sacrifice a creature: Add {C}{C}.
{U}{B}
Baleful Strix
Artifact Creature - Bird
Flying, deathtouch
When Baleful Strix enters the battlefield, draw a card.
1 /
1
{1}
Blade of the Bloodchief
Artifact - Equipment
Whenever a creature dies, put a +1/+1 counter on equipped creature. If equipped creature is a Vampire, put two +1/+1 counters on it instead.
Equip {1}
{2}{B}
Bloodflow Connoisseur
Creature - Vampire
Sacrifice a creature: Put a +1/+1 counter on Bloodflow Connoisseur.
1 /
1
{U}
Brainstorm
Instant
Draw three cards, then put two cards from your hand on top of your library in any order.
{B}
Carrion Feeder
Creature - Zombie
Carrion Feeder can't block.
Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.
1 /
1
{3}
Chromatic Lantern
Artifact
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
{3}
Commander's Sphere
Artifact
{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.
{U}{U}
Counterspell
Instant
Counter target spell.
{U}{B}
Countersquall
Instant
Counter target noncreature spell. Its controller loses 2 life.
{B}{B}
Dauthi Voidwalker
Creature - Dauthi Rogue
Shadow (This creature can block or be blocked by only creatures with shadow.)
If a card would be put into an opponent's graveyard from anywhere, instead exile it with a void counter on it.
{T}, Sacrifice Dauthi Voidwalker: Choose an exiled card an opponent owns with a void counter on it. You may play it this turn without paying its mana cost.
3 /
2
{1}{B}
Deadly Dispute
Instant
As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
{1}{B}
Diabolic Intent
Sorcery
As an additional cost to cast this spell, sacrifice a creature.
Search your library for a card, put that card into your hand, then shuffle.
{3}
Dimir Cluestone
Artifact
{T}: Add {U} or {B}.
{U}{B}, {T}, Sacrifice Dimir Cluestone: Draw a card.
{2}
Dimir Signet
Artifact
{1}, {T}: Add {U}{B}.
{3}{B}
Disciple of Bolas
Creature - Human Wizard
When Disciple of Bolas enters the battlefield, sacrifice another creature. You gain X life and draw X cards, where X is that creature's power.
2 /
1
{3}
Dragon Blood
Artifact
{3}, {T}: Put a +1/+1 counter on target creature.
{U}{U}
Essence Capture
Instant
Counter target creature spell. Put a +1/+1 counter on up to one target creature you control.
--
Exotic Orchard
Land
{T}: Add one mana of any color that a land an opponent controls could produce.
{B}
Feign Death
Instant
Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."
{2}
Fellwar Stone
Artifact
{T}: Add one mana of any color that a land an opponent controls could produce.
{2}{U}
Fierce Guardianship
Instant
If you control a commander, you may cast this spell without paying its mana cost.
Counter target noncreature spell.
{5}{R}
Flayer of the Hatebound
Creature - Devil
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
Whenever Flayer of the Hatebound or another creature enters the battlefield from your graveyard, that creature deals damage equal to its power to any target.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
2 /
2
{1}{R}
Goblin Bombardment
Enchantment
Sacrifice a creature: Goblin Bombardment deals 1 damage to any target.
{2}{B}{B}
Gonti, Lord of Luxury
Legendary Creature - Aetherborn Rogue
Deathtouch
When Gonti, Lord of Luxury enters the battlefield, look at the top four cards of target opponent's library, exile one of them face down, then put the rest on the bottom of that library in a random order. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast it.
2 /
3
{2}{B}
Grim Haruspex
Creature - Human Wizard
Morph {B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
Whenever another nontoken creature you control dies, draw a card.
3 /
2
{3}{U}
Herald of Secret Streams
Creature - Merfolk Warrior
Creatures you control with +1/+1 counters on them can't be blocked.
2 /
3
{2}{U}{B}
Hostage Taker
Creature - Human Pirate
When Hostage Taker enters the battlefield, exile another target creature or artifact until Hostage Taker leaves the battlefield. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast that spell.
2 /
3
{2}{B}{R}
Immersturm Predator
Creature - Vampire Dragon
Flying
Whenever Immersturm Predator becomes tapped, exile up to one target card from a graveyard and put a +1/+1 counter on Immersturm Predator.
Sacrifice another creature: Immersturm Predator gains indestructible until end of turn. Tap it.
3 /
3
{1}
Iron Apprentice
Artifact Creature - Construct
Iron Apprentice enters the battlefield with a +1/+1 counter on it.
When Iron Apprentice dies, if it had counters on it, put those counters on target creature you control.
0 /
0
{3}
Izzet Cluestone
Artifact
{T}: Add {U} or {R}.
{U}{R}, {T}, Sacrifice Izzet Cluestone: Draw a card.
{2}
Izzet Signet
Artifact
{1}, {T}: Add {U}{R}.
{B}{R}
Juri, Master of the Revue
Legendary Creature - Human Shaman
Whenever you sacrifice a permanent, put a +1/+1 counter on Juri, Master of the Revue.
When Juri dies, it deals damage equal to its power to any target.
1 /
1
{B}{R}
Kalain, Reclusive Painter
Legendary Creature - Human Elf Bard
When Kalain, Reclusive Painter enters the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
Other creatures you control enter the battlefield with an additional +1/+1 counter on them for each mana from a Treasure spent to cast them.
1 /
2
{2}{B}{R}
Kardur, Doomscourge
Legendary Creature - Demon Berserker
When Kardur, Doomscourge enters the battlefield, until your next turn, creatures your opponents control attack each combat if able and attack a player other than you if able.
Whenever an attacking creature dies, each opponent loses 1 life and you gain 1 life.
4 /
3
{2}{R}
Krenko, Tin Street Kingpin
Legendary Creature - Goblin
Whenever Krenko, Tin Street Kingpin attacks, put a +1/+1 counter on it, then create a number of 1/1 red Goblin creature tokens equal to Krenko's power.
1 /
2
{2}
Lightning Greaves
Artifact - Equipment
Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip {0}
{1}{B}{R}
Mahadi, Emporium Master
Legendary Creature - Cat Devil
At the beginning of your end step, create a Treasure token for each creature that died this turn. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
3 /
3
{1}{U}{B}{R}
Marchesa, the Black Rose
Legendary Creature - Human Wizard
Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)
Other creatures you control have dethrone.
Whenever a creature you control with a +1/+1 counter on it dies, return that card to the battlefield under your control at the beginning of the next end step.
3 /
3
{2}
Metallic Mimic
Artifact Creature - Shapeshifter
As Metallic Mimic enters the battlefield, choose a creature type.
Metallic Mimic is the chosen type in addition to its other types.
Each other creature you control of the chosen type enters the battlefield with an additional +1/+1 counter on it.
2 /
1
{4}{U}
Mulldrifter
Creature - Elemental
Flying
When Mulldrifter enters the battlefield, draw two cards.
Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)
2 /
2
{1}{U}
Negate
Instant
Counter target noncreature spell.
{B}
Professor's Warning
Instant
Choose one --
• Put a +1/+1 counter on target creature.
• Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
{R}
Pyroblast
Instant
Choose one --
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.
{3}
Rakdos Cluestone
Artifact
{T}: Add {B} or {R}.
{B}{R}, {T}, Sacrifice Rakdos Cluestone: Draw a card.
{2}
Rakdos Signet
Artifact
{1}, {T}: Add {B}{R}.
{3}{U}{U}
River Kelpie
Creature - Beast
Whenever River Kelpie or another permanent enters the battlefield from a graveyard, draw a card.
Whenever a player casts a spell from a graveyard, draw a card.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
3 /
3
{2}{U}
Sage of Fables
Creature - Merfolk Wizard
Each other Wizard creature you control enters the battlefield with an additional +1/+1 counter on it.
{2}, Remove a +1/+1 counter from a creature you control: Draw a card.
2 /
2
{1}
Skullclamp
Artifact - Equipment
Equipped creature gets +1/-1.
Whenever equipped creature dies, draw two cards.
Equip {1}
{3}{R}
Sneak Attack
Enchantment
{R}: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{4}
Solemn Simulacrum
Artifact Creature - Golem
When Solemn Simulacrum enters the battlefield, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
When Solemn Simulacrum dies, you may draw a card.
2 /
2
{2}{U}{U}
Sower of Temptation
Creature - Faerie Wizard
Flying
When Sower of Temptation enters the battlefield, gain control of target creature for as long as Sower of Temptation remains on the battlefield.
2 /
2
{1}{U}
Squelch
Instant
Counter target activated ability. (Mana abilities can't be targeted.)
Draw a card.
{U}
Swan Song
Instant
Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.
{2}
Swiftfoot Boots
Artifact - Equipment
Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)
Equip {1}
{3}{R}{R}
Terror of the Peaks
Creature - Dragon
Flying
Spells your opponents cast that target Terror of the Peaks cost an additional 3 life to cast.
Whenever another creature enters the battlefield under your control, Terror of the Peaks deals damage equal to that creature's power to any target.
5 /
4
{1}{U}
Test of Talents
Instant
Counter target instant or sorcery spell. Search its controller's graveyard, hand, and library for any number of cards with the same name as that spell and exile them. That player shuffles, then draws a card for each card exiled from their hand this way.
{1}
The Ozolith
Legendary Artifact
Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.
At the beginning of combat on your turn, if The Ozolith has counters on it, you may move all counters from The Ozolith onto target creature.
{3}{U}
Thought Sponge
Creature - Sponge
Flash
Thought Sponge enters the battlefield with a number of +1/+1 counters on it equal to the greatest number of cards an opponent has drawn this turn.
When Thought Sponge dies, draw cards equal to its power.
1 /
1
{1}{B}
Thran Vigil
Enchantment
Whenever one or more artifact and/or creature cards leave your graveyard during your turn, put a +1/+1 counter on target creature you control.
{B}
Undying Malice
Instant
Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."
{1}{B}{B}
Unspeakable Symbol
Enchantment
Pay 3 life: Put a +1/+1 counter on target creature.
{B}
Village Rites
Instant
As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.
{1}{U}{U}
Wizard's Retort
Instant
This spell costs {1} less to cast if you control a Wizard.
Counter target spell.
{2}{B}
Yahenni, Undying Partisan
Legendary Creature - Aetherborn Vampire
Haste
Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni, Undying Partisan.
Sacrifice another creature: Yahenni gains indestructible until end of turn.