Swamp

Nomad Outpost

This land enters tapped.
{T}: Add {R}, {W}, or {B}.

Chromatic Lantern

Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.

Spined Sliver

Whenever a Sliver becomes blocked, that Sliver gets +1/+1 until end of turn for each creature blocking it.

Mesmeric Sliver

All Slivers have "When this permanent enters, you may fateseal 1." (To fateseal 1, its controller looks at the top card of an opponent's library, then they may put that card on the bottom of that library.)

The First 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 in a random order.)
Sliver spells you cast have cascade.

Sandsteppe Citadel

This land enters tapped.
{T}: Add {W}, {B}, or {G}.

Spinneret Sliver

Brood Sliver

Whenever a Sliver deals combat damage to a player, its controller may create a 1/1 colorless Sliver creature token.

Harmonic Sliver

All Slivers have "When this permanent enters, destroy target artifact or enchantment."

Necrotic Sliver

All Slivers have "{3}, Sacrifice this permanent: Destroy target permanent."

Explosive Vegetation

Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Hollowhead Sliver

Sliver creatures you control have "{T}, Discard a card: Draw a card."

Horned Sliver

Constricting Sliver

Sliver creatures you control have "When this creature enters, you may exile target creature an opponent controls until this creature leaves the battlefield."

Harrow

As an additional cost to cast this spell, sacrifice a land.
Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

Hunter Sliver

All Sliver creatures have provoke. (Whenever a Sliver attacks, its controller may have target creature defending player controls untap and block it if able.)

Command Tower

{T}: Add one mana of any color in your commander's color identity.

Quick Sliver

Flash
Any player may cast Sliver spells as though they had flash.

Do or Die

Separate all creatures target player controls into two piles. Destroy all creatures in the pile of that player's choice. They can't be regenerated.

Two-Headed Sliver

All Sliver creatures have menace. (They can't be blocked except by two or more creatures.)

Simic Guildgate

This land enters tapped.
{T}: Add {G} or {U}.

Venom Sliver

Sliver creatures you control have deathtouch. (Any amount of damage a creature with deathtouch deals to a creature is enough to destroy it.)

Kodama's Reach

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.

Mystic Monastery

This land enters tapped.
{T}: Add {U}, {R}, or {W}.

Seaside Citadel

This land enters tapped.
{T}: Add {G}, {W}, or {U}.

Opaline Sliver

All Slivers have "Whenever this permanent becomes the target of a spell an opponent controls, you may draw a card."

Rampant Growth

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Heart Sliver

Telekinetic Sliver

All Slivers have "{T}: Tap target permanent."

Arcane Sanctum

This land enters tapped.
{T}: Add {W}, {U}, or {B}.

Spiteful Sliver

Sliver creatures you control have "Whenever this creature is dealt damage, it deals that much damage to target player or planeswalker."

Tempered Sliver

Sliver creatures you control have "Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."

Gemhide Sliver

All Slivers have "{T}: Add one mana of any color."

Mindlash Sliver

All Slivers have "{1}, Sacrifice this permanent: Each player discards a card."

Gruul Guildgate

This land enters tapped.
{T}: Add {R} or {G}.

Opulent Palace

This land enters tapped.
{T}: Add {B}, {G}, or {U}.

Boros Guildgate

This land enters tapped.
{T}: Add {R} or {W}.

Manaweft Sliver

Sliver creatures you control have "{T}: Add one mana of any color."

Rakdos Guildgate

This land enters tapped.
{T}: Add {B} or {R}.

Izzet Guildgate

This land enters tapped.
{T}: Add {U} or {R}.

Bonescythe Sliver

Sliver creatures you control have double strike. (They deal both first-strike and regular combat damage.)

Sinew Sliver

Orzhov Guildgate

This land enters tapped.
{T}: Add {W} or {B}.

Azorius Guildgate

This land enters tapped.
{T}: Add {W} or {U}.

Quilled Sliver

All Slivers have "{T}: This permanent deals 1 damage to target attacking or blocking creature."

Might Sliver

Island

Jungle Shrine

This land enters tapped.
{T}: Add {R}, {G}, or {W}.

Diffusion 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}.

Snow-Covered Plains

Crumbling Necropolis

This land enters tapped.
{T}: Add {U}, {B}, or {R}.

Cloudshredder Sliver

Sliver creatures you control have flying and haste.

Snow-Covered Swamp

Virulent Sliver

All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)

Mnemonic Sliver

All Slivers have "{2}, Sacrifice this permanent: Draw a card."

Dementia Sliver

All Slivers have "{T}: Choose a card name. Target opponent reveals a card at random from their hand. If that card has the chosen name, that player discards it. Activate only during your turn."

Predatory Sliver

Megantic Sliver

Frontier Bivouac

This land enters tapped.
{T}: Add {G}, {U}, or {R}.

Springbloom Druid

When this creature enters, you may sacrifice a land. If you do, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Plains

Belligerent Sliver

Sliver creatures you control have menace. (They can't be blocked except by two or more creatures.)

Blade Sliver

Forest

Crypt Sliver

All Slivers have "{T}: Regenerate target Sliver."

Snow-Covered Forest

Winged Sliver

Cultivate

Enduring 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}.

Cleaving Sliver

Snow-Covered Island

Go for the Throat

Golgari Guildgate

This land enters tapped.
{T}: Add {B} or {G}.

Striking Sliver

Sliver creatures you control have first strike. (They deal combat damage before creatures without first strike.)

Mountain

Snow-Covered Mountain

Fury Sliver

Leeching Sliver

Whenever a Sliver you control attacks, defending player loses 1 life.

Murder

Lavabelly Sliver

Sliver creatures you control have "When this creature enters, it deals 1 damage to target player or planeswalker and you gain 1 life."

Rugged Highlands

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {R} or {G}.

Sentinel Sliver

Sliver creatures you control have vigilance. (Attacking doesn't cause them to tap.)

Savage Lands

This land enters tapped.
{T}: Add {B}, {R}, or {G}.

Blasphemous Act

This spell costs {1} less to cast for each creature on the battlefield.
Blasphemous Act deals 13 damage to each creature.

Blur Sliver

Sliver creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Sidewinder Sliver

All Sliver creatures have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking creature gets -1/-1 until end of turn.)

Doom Blade

Muscle Sliver

Lancer Sliver

Sliver creatures you control have first strike.

Farseek

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Bident of Thassa

Whenever a creature you control deals combat damage to a player, you may draw a card.
{1}{U}, {T}: Creatures your opponents control attack this turn if able.

Selesnya Guildgate

This land enters tapped.
{T}: Add {G} or {W}.

Clot Sliver

All Slivers have "{2}: Regenerate this permanent."

Path of Ancestry

This land enters 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.)