{T}, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, then shuffle.
{3}{W}
Armageddon
Sorcery
Destroy all lands.
{B}{G}
Assassin's Trophy
Instant
Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.
--
Bayou
Land - Swamp Forest
({T}: Add {B} or {G}.)
{3}{W}
Bonescythe Sliver
Creature - Sliver
Sliver creatures you control have double strike. (They deal both first-strike and regular combat damage.)
2 /
2
{3}{U}
Call to the Kindred
Enchantment - Aura
Enchant creature
At the beginning of your upkeep, you may look at the top five cards of your library. If you do, you may put a creature card that shares a creature type with enchanted creature from among them onto the battlefield, then you put the rest of those cards on the bottom of your library in any order.
--
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.
{2}{W}{W}
Clever Concealment
Instant
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Any number of target nonland permanents you control phase out. (Treat them and anything attached to them as though they don't exist until your next turn.)
{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.
{1}{G}
Commune with the Gods
Sorcery
Reveal the top five cards of your library. You may put a creature or enchantment card from among them into your hand. Put the rest into your graveyard.
{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.
{1}{B}
Crypt Sliver
Creature - Sliver
All Slivers have "{T}: Regenerate target Sliver."
1 /
1
{1}{G}
Cryptolith Rite
Enchantment
Creatures you control have "{T}: Add one mana of any color."
{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}{B}
Damn
Sorcery
Destroy target creature. A creature destroyed this way can't be regenerated.
Overload {2}{W}{W} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
{2}{B}{B}
Damnation
Sorcery
Destroy all creatures. They can't be regenerated.
{B}{G}
Darkheart Sliver
Creature - Sliver
All Slivers have "Sacrifice this permanent: You gain 3 life."
2 /
2
{2}{R}{G}
Decimate
Sorcery
Destroy target artifact, target creature, target enchantment, and target land. (You can't cast this spell unless you have legal choices for all its targets.)
{3}{G}
Defense of the Heart
Enchantment
At the beginning of your upkeep, if an opponent controls three or more creatures, sacrifice Defense of the Heart, search your library for up to two creature cards, put those cards onto the battlefield, then shuffle.
{2}{G}
Descendants' Path
Enchantment
At the beginning of your upkeep, reveal the top card of your library. If it's a creature card that shares a creature type with a creature you control, you may cast it without paying its mana cost. If you don't cast it, put it on the bottom of your library.
{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}{U}{U}
Disallow
Instant
Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)
{3}{U}
Distant Melody
Sorcery
Choose a creature type. Draw a card for each permanent you control of that type.
{2}{U}
Fierce Guardianship
Instant
If you control a commander, you may cast this spell without paying its mana cost.
Counter target noncreature spell.
--
Flooded Strand
Land
{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.
{2}{G}
For the Ancestors
Instant
Choose a creature type. Look at the top six cards of your library. You may reveal any number of cards of the chosen type from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in a random order.
Flashback {3}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{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
{1}{G}{W}
Harmonic Sliver
Creature - Sliver
All Slivers have "When this permanent enters the battlefield, destroy target artifact or enchantment."
1 /
1
{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.
{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
{2}{G}
Horned Sliver
Creature - Sliver
All Sliver creatures have trample.
2 /
2
--
Indatha Triome
Land - Plains Swamp Forest
({T}: Add {W}, {B}, or {G}.)
Indatha Triome enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
--
Jetmir's Garden
Land - Mountain Forest Plains
({T}: Add {R}, {G}, or {W}.)
Jetmir's Garden enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
--
Ketria Triome
Land - Forest Island Mountain
({T}: Add {G}, {U}, or {R}.)
Ketria Triome enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
{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.
{1}{G}
Manaweft Sliver
Creature - Sliver
Sliver creatures you control have "{T}: Add one mana of any color."
1 /
1
--
Marsh Flats
Land
{T}, Pay 1 life, Sacrifice Marsh Flats: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle.
{2}{W}
Mirror Entity
Creature - Shapeshifter
Changeling (This card is every creature type.)
{X}: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.
1 /
1
--
Misty Rainforest
Land
{T}, Pay 1 life, Sacrifice Misty Rainforest: Search your library for a Forest or Island card, put it onto the battlefield, then shuffle.
{1}{G}
Muscle Sliver
Creature - Sliver
All Sliver creatures get +1/+1.
1 /
1
--
Mutavault
Land
{T}: Add {C}.
{1}: Mutavault becomes a 2/2 creature with all creature types until end of turn. It's still a land.
{1}{W}{B}
Necrotic Sliver
Creature - Sliver
All Slivers have "{3}, Sacrifice this permanent: Destroy target permanent."
2 /
2
{1}{U}
Negate
Instant
Counter target noncreature spell.
--
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.)
{W}
Path to Exile
Instant
Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.
--
Plateau
Land - Mountain Plains
({T}: Add {R} or {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}
Predatory Sliver
Creature - Sliver
Sliver creatures you control get +1/+1.
1 /
1
{1}{G}
Quick Sliver
Creature - Sliver
Flash
Any player may cast Sliver spells as though they had flash.
1 /
1
--
Raffine's Tower
Land - Plains Island Swamp
({T}: Add {W}, {U}, or {B}.)
Raffine's Tower enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
--
Raugrin Triome
Land - Island Mountain Plains
({T}: Add {U}, {R}, or {W}.)
Raugrin Triome enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
{2}{U}
Rhystic Study
Enchantment
Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.
--
Savannah
Land - Forest Plains
({T}: Add {G} or {W}.)
--
Scalding Tarn
Land
{T}, Pay 1 life, Sacrifice Scalding Tarn: Search your library for an Island or Mountain card, put it onto the battlefield, then shuffle.
--
Scrubland
Land - Plains Swamp
({T}: Add {W} or {B}.)
{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
{W}
Silence
Instant
Your opponents can't cast spells this turn.
{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}.
--
Spara's Headquarters
Land - Forest Plains Island
({T}: Add {G}, {W}, or {U}.)
Spara's Headquarters enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
{1}{G}
Steely Resolve
Enchantment
As Steely Resolve enters the battlefield, choose a creature type.
Creatures of the chosen type have shroud. (They can't be the targets of spells or abilities.)
{R}
Striking Sliver
Creature - Sliver
Sliver creatures you control have first strike. (They deal combat damage before creatures without first strike.)
1 /
1
{2}{W}
Stroke of Midnight
Instant
Destroy target nonland permanent. Its controller creates a 1/1 white Human creature token.
{W}
Swords to Plowshares
Instant
Exile target creature. Its controller gains life equal to its power.
{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
--
Taiga
Land - Mountain Forest
({T}: Add {R} or {G}.)
{1}{W}
Talon Sliver
Creature - Sliver
All Sliver creatures have first strike.
1 /
1
{2}{W}
Teferi's Protection
Instant
Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)
Exile Teferi's Protection.
{2}{U}{U}
Telekinetic Sliver
Creature - Sliver
All Slivers have "{T}: Tap target permanent."
2 /
2
{B}{R}
Terminate
Instant
Destroy target creature. It can't be regenerated.
{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.
--
Tropical Island
Land - Forest Island
({T}: Add {G} or {U}.)
--
Tundra
Land - Plains Island
({T}: Add {W} or {U}.)
--
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.
--
Underground Sea
Land - Island Swamp
({T}: Add {U} or {B}.)
{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.
{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
--
Verdant Catacombs
Land
{T}, Pay 1 life, Sacrifice Verdant Catacombs: Search your library for a Swamp or Forest card, put it onto the battlefield, then shuffle.
{W}{U}{B}
Void Rend
Instant
This spell can't be countered.
Destroy target nonland permanent.
{G}{U}{U}
Voidslime
Instant
Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)
--
Volcanic Island
Land - Island Mountain
({T}: Add {U} or {R}.)
{4}{W}
Ward Sliver
Creature - Sliver
As Ward Sliver enters the battlefield, choose a color.
All Slivers have protection from the chosen color.
2 /
2
--
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.
--
Xander's Lounge
Land - Island Swamp Mountain
({T}: Add {U}, {B}, or {R}.)
Xander's Lounge enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
--
Zagoth Triome
Land - Swamp Forest Island
({T}: Add {B}, {G}, or {U}.)
Zagoth Triome enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
--
Ziatora's Proving Ground
Land - Swamp Mountain Forest
({T}: Add {B}, {R}, or {G}.)
Ziatora's Proving Ground enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)