At the beginning of your upkeep, you may put a charge counter on Aether Vial.
{T}: You may put a creature card with mana value equal to the number of charge counters on Aether Vial from your hand onto the battlefield.
{1}{U}
Amoeboid Changeling
Creature - Shapeshifter
Changeling (This card is every creature type.)
{T}: Target creature gains all creature types until end of turn.
{T}: Target creature loses all creature types until end of turn.
1 /
1
{3}{W}
Armageddon
Sorcery
Destroy all lands.
{2}{B}
Basal Sliver
Creature - Sliver
All Slivers have "Sacrifice this permanent: Add {B}{B}."
2 /
2
{2}{G}
Beastmaster Ascension
Enchantment
Whenever a creature you control attacks, you may put a quest counter on Beastmaster Ascension.
As long as Beastmaster Ascension has seven or more quest counters on it, creatures you control get +5/+5.
--
Blood Crypt
Land - Swamp Mountain
({T}: Add {B} or {R}.)
As Blood Crypt enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
--
Bloodstained Mire
Land
{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.
{3}{W}
Bonescythe Sliver
Creature - Sliver
Sliver creatures you control have double strike. (They deal both first-strike and regular combat damage.)
2 /
2
--
Breeding Pool
Land - Forest Island
({T}: Add {G} or {U}.)
As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{4}{G}
Brood Sliver
Creature - Sliver
Whenever a Sliver deals combat damage to a player, its controller may create a 1/1 colorless Sliver creature token.
3 /
3
--
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}
Chromatic Lantern
Artifact
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
--
City of Brass
Land
Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.
{R}{W}
Cloudshredder Sliver
Creature - Sliver
Sliver creatures you control have flying and haste.
1 /
1
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{5}
Cryptic Gateway
Artifact
Tap two untapped creatures you control: You may put a creature card from your hand that shares a creature type with each creature tapped this way onto the battlefield.
{1}{G}
Cryptolith Rite
Enchantment
Creatures you control have "{T}: Add one mana of any color."
{W}{U}
Crystalline Sliver
Creature - Sliver
All Slivers have shroud. (They can't be the targets of spells or abilities.)
2 /
2
{2}{G}
Cultivate
Sorcery
Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.
{1}{U}
Cyclonic Rift
Instant
Return target nonland permanent you don't control to its owner's hand.
Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
{B}{G}
Darkheart Sliver
Creature - Sliver
All Slivers have "Sacrifice this permanent: You gain 3 life."
2 /
2
{3}
Darksteel Ingot
Artifact
Indestructible
{T}: Add one mana of any color.
{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
{1}{W}
Disenchant
Instant
Destroy target artifact or enchantment.
{2}{G}{U}
Dormant Sliver
Creature - Sliver
All Sliver creatures have defender.
All Slivers have "When this permanent enters the battlefield, draw a card."
2 /
2
--
Dragonskull Summit
Land
Dragonskull Summit enters the battlefield tapped unless you control a Swamp or a Mountain.
{T}: Add {B} or {R}.
--
Drowned Catacomb
Land
Drowned Catacomb enters the battlefield tapped unless you control an Island or a Swamp.
{T}: Add {U} or {B}.
--
Exotic Orchard
Land
{T}: Add one mana of any color that a land an opponent controls could produce.
{1}{G}
Farseek
Sorcery
Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.
{3}{U}{U}
Force of Will
Instant
You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.
Counter target spell.
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
{U}
Galerider Sliver
Creature - Sliver
Sliver creatures you control have flying.
1 /
1
{1}{G}
Gemhide Sliver
Creature - Sliver
All Slivers have "{T}: Add one mana of any color."
1 /
1
--
Glacial Fortress
Land
Glacial Fortress enters the battlefield tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.
--
Hallowed Fountain
Land - Plains Island
({T}: Add {W} or {U}.)
As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{1}{G}{W}
Harmonic Sliver
Creature - Sliver
All Slivers have "When this permanent enters the battlefield, destroy target artifact or enchantment."
1 /
1
{2}{G}
Harvest Season
Sorcery
Search your library for up to X basic land cards, where X is the number of tapped creatures you control, put those cards onto the battlefield tapped, then shuffle.
{1}{R}
Heart Sliver
Creature - Sliver
All Sliver creatures have haste.
1 /
1
{3}
Herald's Horn
Artifact
As Herald's Horn enters the battlefield, choose a creature type.
Creature spells you cast of the chosen type cost {1} less to cast.
At the beginning of your upkeep, look at the top card of your library. If it's a creature card of the chosen type, you may reveal it and put it into your hand.
{U}{B}
Hibernation Sliver
Creature - Sliver
All Slivers have "Pay 2 life: Return this permanent to its owner's hand."
2 /
2
{2}{R}
Homing Sliver
Creature - Sliver
Each Sliver card in each player's hand has slivercycling {3}.
Slivercycling {3} ({3}, Discard this card: Search your library for a Sliver card, reveal it, put it into your hand, then shuffle.)
2 /
2
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
{2}{G}
Kodama's Reach
Sorcery - Arcane
Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.
{3}{B}{B}
Living Death
Sorcery
Each player exiles all creature cards from their graveyard, then sacrifices all creatures they control, then puts all cards they exiled this way onto the battlefield.
{3}{R}
Magma Sliver
Creature - Sliver
All Slivers have "{T}: Target Sliver creature gets +X/+0 until end of turn, where X is the number of Slivers on the battlefield."
3 /
3
--
Mana Confluence
Land
{T}, Pay 1 life: Add one mana of any color.
{U}{U}
Mana Drain
Instant
Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.
{2}{R}{R}
Mana Echoes
Enchantment
Whenever a creature enters the battlefield, you may add an amount of {C} equal to the number of creatures you control that share a creature type with it.
{1}{G}
Manaweft Sliver
Creature - Sliver
Sliver creatures you control have "{T}: Add one mana of any color."
1 /
1
{5}{G}
Megantic Sliver
Creature - Sliver
Sliver creatures you control get +3/+3.
3 /
3
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{1}{G}
Muscle Sliver
Creature - Sliver
All Sliver creatures get +1/+1.
1 /
1
{1}{W}{B}
Necrotic Sliver
Creature - Sliver
All Slivers have "{3}, Sacrifice this permanent: Destroy target permanent."
2 /
2
--
Overgrown Tomb
Land - Swamp Forest
({T}: Add {B} or {G}.)
As Overgrown Tomb enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{5}
Paradox Engine
Legendary Artifact
Whenever you cast a spell, untap all nonland permanents you control.
--
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}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Polluted Delta
Land
{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.
{1}{G}
Quick Sliver
Creature - Sliver
Flash
Any player may cast Sliver spells as though they had flash.
1 /
1
--
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}.
{3}{G}
Root Sliver
Creature - Sliver
This spell can't be countered.
Sliver spells can't be countered.
2 /
2
--
Rootbound Crag
Land
Rootbound Crag enters the battlefield tapped unless you control a Mountain or a Forest.
{T}: Add {R} or {G}.
{2}{R}
Sedge Sliver
Creature - Sliver
All Sliver creatures have "This creature gets +1/+1 as long as you control a Swamp."
All Slivers have "{B}: Regenerate this permanent." (The next time it would be destroyed, instead tap it, remove it from combat, and heal all damage on it.)
2 /
2
{1}{W}
Sentinel Sliver
Creature - Sliver
Sliver creatures you control have vigilance. (Attacking doesn't cause them to tap.)
2 /
2
{3}{U}
Shifting Sliver
Creature - Sliver
Slivers can't be blocked except by Slivers.
2 /
2
{1}{W}
Sinew Sliver
Creature - Sliver
All Sliver creatures get +1/+1.
1 /
1
--
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
{W}{U}{B}{R}{G}
Sliver Queen
Legendary Creature - Sliver
{2}: Create a 1/1 colorless Sliver creature token.
7 /
7
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{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
--
Stomping Ground
Land - Mountain Forest
({T}: Add {R} or {G}.)
As Stomping Ground enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
--
Sunpetal Grove
Land
Sunpetal Grove enters the battlefield tapped unless you control a Forest or a Plains.
{T}: Add {G} or {W}.
{1}{W}{W}{U}
Supreme Verdict
Sorcery
This spell can't be countered.
Destroy all creatures.
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
{U}
Swan Song
Instant
Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.
{W}
Swords to Plowshares
Instant
Exile target creature. Its controller gains life equal to its power.
{1}{G}
Sylvan Scrying
Sorcery
Search your library for a land card, reveal it, put it into your hand, then shuffle.
{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
--
Temple Garden
Land - Forest Plains
({T}: Add {G} or {W}.)
As Temple Garden enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{W}{U}{B}{R}{G}
The First Sliver
Legendary Creature - Sliver
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)
Sliver spells you cast have cascade.
7 /
7
{U}
Training Grounds
Enchantment
Activated abilities of creatures you control cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.
{X}{G}{G}
Uncage the Menagerie
Sorcery
Search your library for up to X creature cards with different names that each have mana value X, reveal them, put them into your hand, then shuffle.
--
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.
{1}{U}
Unnatural Selection
Enchantment
{1}: Choose a creature type other than Wall. Target creature becomes that type until end of turn.
--
Urborg, Tomb of Yawgmoth
Legendary Land
Each land is a Swamp in addition to its other land types.
{3}
Urza's Incubator
Artifact
As Urza's Incubator enters the battlefield, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.
{B}
Vampiric Tutor
Instant
Search your library for a card, then shuffle and put that card on top. You lose 2 life.
{4}{G}{G}
Wild Pair
Enchantment
Whenever a creature enters the battlefield, if you cast it from your hand, you may search your library for a creature card with the same total power and toughness, put it onto the battlefield, then shuffle.
--
Windswept Heath
Land
{T}, Pay 1 life, Sacrifice Windswept Heath: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle.
--
Wooded Foothills
Land
{T}, Pay 1 life, Sacrifice Wooded Foothills: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.
{G}
Worldly Tutor
Instant
Search your library for a creature card, reveal it, then shuffle and put the card on top.