Whenever one or more +1/+1 counters are put on a permanent you control, you may pay {1}. If you do, create a 1/1 colorless Servo artifact creature token.
{3}, {T}: Choose a counter on target permanent or player. Give that permanent or player another counter of that kind.
--
Arcane Sanctum
Land
Arcane Sanctum enters the battlefield tapped.
{T}: Add {W}, {U}, or {B}.
{4}{R}
Battle Sliver
Creature - Sliver
Sliver creatures you control get +2/+0.
3 /
3
{2}{R}
Blur Sliver
Creature - Sliver
Sliver creatures you control have haste. (They can attack and {T} as soon as they come under your control.)
2 /
2
{3}{W}
Bonescythe Sliver
Creature - Sliver
Sliver creatures you control have double strike. (They deal both first-strike and regular combat damage.)
2 /
2
--
Cavern of Souls
Land
As Cavern of Souls enters the battlefield, choose a creature type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.
{3}{R}
Cleaving Sliver
Creature - Sliver
Sliver creatures you control get +2/+0.
2 /
2
{R}{W}
Cloudshredder Sliver
Creature - Sliver
Sliver creatures you control have flying and haste.
1 /
1
{5}
Coat of Arms
Artifact
Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{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.
{5}{W}
Constricting Sliver
Creature - Sliver
Sliver creatures you control have "When this creature enters the battlefield, you may exile target creature an opponent controls until this creature leaves the battlefield."
3 /
3
{U}{U}
Counterspell
Instant
Counter target spell.
--
Crumbling Necropolis
Land
Crumbling Necropolis enters the battlefield tapped.
{T}: Add {U}, {B}, or {R}.
{1}{B}
Crypt Sliver
Creature - Sliver
All Slivers have "{T}: Regenerate target Sliver."
1 /
1
--
Crypt of the Eternals
Land
When Crypt of the Eternals enters the battlefield, you gain 1 life.
{T}: Add {C}.
{1}, {T}: Add {U}, {B}, or {R}.
{W}{U}
Crystalline Sliver
Creature - Sliver
All Slivers have shroud. (They can't be the targets of spells or abilities.)
2 /
2
--
Detection Tower
Land
{T}: Add {C}.
{1}, {T}: Until end of turn, your opponents and creatures your opponents control with hexproof can be the targets of spells and abilities you control as though they didn't have hexproof.
{1}{U}
Diffusion Sliver
Creature - Sliver
Whenever a Sliver creature you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {2}.
1 /
1
{4}
Door of Destinies
Artifact
As Door of Destinies enters the battlefield, choose a creature type.
Whenever you cast a spell of the chosen type, put a charge counter on Door of Destinies.
Creatures you control of the chosen type get +1/+1 for each charge counter on Door of Destinies.
{1}{B}
Dregscape Sliver
Creature - Sliver
Each Sliver creature card in your graveyard has unearth {2}.
Unearth {2} ({2}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)
2 /
2
{1}{W}
Enduring Sliver
Creature - Sliver
Outlast {2} ({2}, {T}: Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Other Sliver creatures you control have outlast {2}.
2 /
2
{U}{U}
Essence Capture
Instant
Counter target creature spell. Put a +1/+1 counter on up to one target creature you control.
{1}{W}{B}
Etchings of the Chosen
Enchantment
As Etchings of the Chosen enters the battlefield, choose a creature type.
Creatures you control of the chosen type get +1/+1.
{1}, Sacrifice a creature of the chosen type: Target creature you control gains indestructible until end of turn.
{4}{W}
First Sliver's Chosen
Creature - Sliver
Sliver creatures you control have exalted. (Whenever a creature you control attacks alone, it gets +1/+1 until end of turn for each instance of exalted among permanents you control.)
3 /
3
--
Forest
Basic Land - Forest
({T}: Add {G}.)
{1}{U}{R}
Frenetic Sliver
Creature - Sliver
All Slivers have "{0}: If this permanent is on the battlefield, flip a coin. If you win the flip, exile this permanent and return it to the battlefield under its owner's control at the beginning of the next end step. If you lose the flip, sacrifice it."
2 /
2
--
Frontier Bivouac
Land
Frontier Bivouac enters the battlefield tapped.
{T}: Add {G}, {U}, or {R}.
{U}
Galerider Sliver
Creature - Sliver
Sliver creatures you control have flying.
1 /
1
--
Gateway Plaza
Land - Gate
Gateway Plaza enters the battlefield tapped.
When Gateway Plaza enters the battlefield, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.
{6}{G}
Groundshaker Sliver
Creature - Sliver
Sliver creatures you control have trample. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)
5 /
5
{1}{G}{U}
Hadana's Climb
Legendary Enchantment
At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. Then if that creature has three or more +1/+1 counters on it, transform Hadana's Climb.
--
Winged Temple of Orazca
Legendary Land
(Transforms from Hadana's Climb.)
{T}: Add one mana of any color.
{1}{G}{U}, {T}: Target creature you control gains flying and gets +X/+X until end of turn, where X is its power.
{2}{R}
Hollowhead Sliver
Creature - Sliver
Sliver creatures you control have "{T}, Discard a card: Draw a card."
2 /
2
{3}
Icon of Ancestry
Artifact
As Icon of Ancestry enters the battlefield, choose a creature type.
Creatures you control of the chosen type get +1/+1.
{3}, {T}: Look at the top three cards of your library. You may reveal a creature card of the chosen type from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
{1}{U}{R}
Ionize
Instant
Counter target spell. Ionize deals 2 damage to that spell's controller.
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Jungle Shrine
Land
Jungle Shrine enters the battlefield tapped.
{T}: Add {R}, {G}, or {W}.
{3}{U}{U}
Kindred Discovery
Enchantment
As Kindred Discovery enters the battlefield, choose a creature type.
Whenever a creature you control of the chosen type enters the battlefield or attacks, draw a card.
{2}{W}
Lancer Sliver
Creature - Sliver
Sliver creatures you control have first strike.
2 /
2
{1}{R}{W}
Lavabelly Sliver
Creature - Sliver
Sliver creatures you control have "When this creature enters the battlefield, it deals 1 damage to target player or planeswalker and you gain 1 life."
2 /
2
{1}{B}
Leeching Sliver
Creature - Sliver
Whenever a Sliver you control attacks, defending player loses 1 life.
1 /
1
{3}
Manalith
Artifact
{T}: Add one mana of any color.
{5}{G}
Megantic Sliver
Creature - Sliver
Sliver creatures you control get +3/+3.
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
{5}
Meteorite
Artifact
When Meteorite enters the battlefield, it deals 2 damage to any target.
{T}: Add one mana of any color.
{1}{U}
Military Intelligence
Enchantment
Whenever you attack with two or more creatures, draw a card.
{7}
Morophon, the Boundless
Legendary Creature - Shapeshifter
Changeling (This card is every creature type.)
As Morophon, the Boundless enters the battlefield, choose a creature type.
Spells of the chosen type you cast cost {W}{U}{B}{R}{G} less to cast. This effect reduces only the amount of colored mana you pay.
Other creatures you control of the chosen type get +1/+1.
6 /
6
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{3}
Oketra's Monument
Legendary Artifact
White creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, create a 1/1 white Warrior creature token with vigilance.
--
Opal Palace
Land
{T}: Add {C}.
{1}, {T}: Add one mana of any color in your commander's color identity. If you spend this mana to cast your commander, it enters the battlefield with a number of additional +1/+1 counters on it equal to the number of times it's been cast from the command zone this game.
--
Opulent Palace
Land
Opulent Palace enters the battlefield tapped.
{T}: Add {B}, {G}, or {U}.
--
Path of Ancestry
Land
Path of Ancestry enters the battlefield tapped.
{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
{1}{G}{W}
Pledge of Unity
Instant
Put a +1/+1 counter on each creature you control. You gain 1 life for each creature you control.
{1}{G}
Predatory Sliver
Creature - Sliver
Sliver creatures you control get +1/+1.
1 /
1
{3}{W}{W}
Pulmonic Sliver
Creature - Sliver
All Sliver creatures have flying.
All Slivers have "If this permanent would be put into a graveyard, you may put it on top of its owner's library instead."
3 /
3
--
Reflecting Pool
Land
{T}: Add one mana of any type that a land you control could produce.
{2}{U}
Rhystic Study
Enchantment
Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.
--
Rogue's Passage
Land
{T}: Add {C}.
{4}, {T}: Target creature can't be blocked this turn.
--
Rupture Spire
Land
Rupture Spire enters the battlefield tapped.
When Rupture Spire enters the battlefield, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.
--
Savage Lands
Land
Savage Lands enters the battlefield tapped.
{T}: Add {B}, {R}, or {G}.
{2}{U}
Scuttling Sliver
Creature - Sliver Trilobite
Sliver creatures you control have "{2}: Untap this creature."
2 /
2
--
Seaside Citadel
Land
Seaside Citadel enters the battlefield tapped.
{T}: Add {G}, {W}, or {U}.
{1}{W}
Sentinel Sliver
Creature - Sliver
Sliver creatures you control have vigilance. (Attacking doesn't cause them to tap.)
2 /
2
{1}{W}
Shared Triumph
Enchantment
As Shared Triumph enters the battlefield, choose a creature type.
Creatures of the chosen type get +1/+1.
{G}{U}
Simic Ascendancy
Enchantment
{1}{G}{U}: Put a +1/+1 counter on target creature you control.
Whenever one or more +1/+1 counters are put on a creature you control, put that many growth counters on Simic Ascendancy.
At the beginning of your upkeep, if Simic Ascendancy has twenty or more growth counters on it, you win the game.
{1}{U}{U}
Sinister Sabotage
Instant
Counter target spell.
Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
--
Sliver Hive
Land
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a Sliver spell.
{5}, {T}: Create a 1/1 colorless Sliver creature token. Activate only if you control a Sliver.
{W}{U}{B}{R}{G}
Sliver Hivelord
Legendary Creature - Sliver
Sliver creatures you control have indestructible. (Damage and effects that say "destroy" don't destroy them.)
5 /
5
{W}{U}{B}{R}{G}
Sliver Legion
Legendary Creature - Sliver
All Sliver creatures get +1/+1 for each other Sliver on the battlefield.
7 /
7
{W}{U}{B}{R}{G}
Sliver Overlord
Legendary Creature - Sliver Mutant
{3}: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle.
{3}: Gain control of target Sliver. (This effect lasts indefinitely.)
7 /
7
{1}
Soul Net
Artifact
Whenever a creature dies, you may pay {1}. If you do, you gain 1 life.
{2}{R}
Spiteful Sliver
Creature - Sliver
Sliver creatures you control have "Whenever this creature is dealt damage, it deals that much damage to target player or planeswalker."
2 /
2
{2}{W}
Steelform Sliver
Creature - Sliver
Sliver creatures you control get +0/+1.
2 /
2
{4}{G}{G}
Strength of the Pack
Sorcery
Put two +1/+1 counters on each creature you control.
{R}
Striking Sliver
Creature - Sliver
Sliver creatures you control have first strike. (They deal combat damage before creatures without first strike.)
1 /
1
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
{2}{B}
Syphon Sliver
Creature - Sliver
Sliver creatures you control have lifelink. (Damage dealt by a Sliver creature you control also causes you to gain that much life.)
2 /
2
{2}{G}
Tempered Sliver
Creature - Sliver
Sliver creatures you control have "Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
2 /
2
{1}
Terrarion
Artifact
Terrarion enters the battlefield tapped.
{2}, {T}, Sacrifice Terrarion: Add two mana in any combination of colors.
When Terrarion is put into a graveyard from the battlefield, draw a card.
{4}{R}
Thorncaster Sliver
Creature - Sliver
Sliver creatures you control have "Whenever this creature attacks, it deals 1 damage to any target."
2 /
2
--
Thran Quarry
Land
At the beginning of the end step, if you control no creatures, sacrifice Thran Quarry.
Transguild Promenade enters the battlefield tapped.
When Transguild Promenade enters the battlefield, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.
--
Unclaimed Territory
Land
As Unclaimed Territory enters the battlefield, choose a creature type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.
{W}{U}
Unsettled Mariner
Creature - Shapeshifter
Changeling (This card is every creature type.)
Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {1}.
2 /
2
{B}
Vampiric Rites
Enchantment
{1}{B}, Sacrifice a creature: You gain 1 life and draw a card.
{5}
Vanquisher's Banner
Artifact
As Vanquisher's Banner enters the battlefield, choose a creature type.
Creatures you control of the chosen type get +1/+1.
Whenever you cast a creature spell of the chosen type, draw a card.
{1}{G}
Venom Sliver
Creature - Sliver
Sliver creatures you control have deathtouch. (Any amount of damage a creature with deathtouch deals to a creature is enough to destroy it.)
1 /
1
--
Westvale Abbey
Land
{T}: Add {C}.
{5}, {T}, Pay 1 life: Create a 1/1 white and black Human Cleric creature token.
{5}, {T}, Sacrifice five creatures: Transform Westvale Abbey, then untap it.
--
Ormendahl, Profane Prince
Legendary Creature - Demon
Flying, lifelink, indestructible, haste
{3}{G}
Wild Onslaught
Instant
Kicker {4} (You may pay an additional {4} as you cast this spell.)
Put a +1/+1 counter on each creature you control. If this spell was kicked, put two +1/+1 counters on each creature you control instead.