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
{2}
Boros Signet
Artifact
{1}, {T}: Add {R}{W}.
{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
--
Cascading Cataracts
Land
Indestructible
{T}: Add {C}.
{5}, {T}: Add five mana in any combination of colors.
--
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}{G}
Channel the Suns
Sorcery
Add {W}{U}{B}{R}{G}.
{3}
Chromatic Lantern
Artifact
Lands you control have "{T}: Add one mana of any color."
{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.
{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.
{6}
Composite Golem
Artifact Creature - Golem
Sacrifice Composite Golem: Add {W}{U}{B}{R}{G}.
4 /
4
--
Crumbling Necropolis
Land
Crumbling Necropolis enters the battlefield tapped.
{T}: Add {U}, {B}, or {R}.
--
Crystal Quarry
Land
{T}: Add {C}.
{5}, {T}: Add {W}{U}{B}{R}{G}.
{2}
Dimir Signet
Artifact
{1}, {T}: Add {U}{B}.
{3}{W}
Essence Sliver
Creature - Sliver
Whenever a Sliver deals damage, its controller gains that much life.
3 /
3
--
Frontier Bivouac
Land
Frontier Bivouac enters the battlefield tapped.
{T}: Add {G}, {U}, or {R}.
{3}{G}
Fungus Sliver
Creature - Fungus Sliver
All Sliver creatures have "Whenever this creature is dealt damage, put a +1/+1 counter on it." (It must survive the damage to get the counter.)
2 /
2
{U}
Galerider Sliver
Creature - Sliver
Sliver creatures you control have flying.
1 /
1
{5}
Geode Golem
Artifact Creature - Golem
Trample
Whenever Geode Golem deals combat damage to a player, you may cast your commander from the command zone without paying its mana cost. (You still pay any additional costs.)
5 /
3
{2}
Golgari Signet
Artifact
{1}, {T}: Add {B}{G}.
{2}
Gruul Signet
Artifact
{1}, {T}: Add {R}{G}.
{2}
Izzet Signet
Artifact
{1}, {T}: Add {U}{R}.
--
Jungle Shrine
Land
Jungle Shrine enters the battlefield tapped.
{T}: Add {R}, {G}, or {W}.
{W}{U}{B}{R}{G}
Maelstrom Archangel
Creature - Angel
Flying
Whenever Maelstrom Archangel deals combat damage to a player, you may cast a spell from your hand without paying its mana cost.
5 /
5
{W}{U}{B}{R}{G}
Maelstrom Nexus
Enchantment
The first spell you cast each turn has cascade. (When you cast your first 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.)
{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
{5}{G}
Megantic Sliver
Creature - Sliver
Sliver creatures you control get +3/+3.
3 /
3
--
Mystic Monastery
Land
Mystic Monastery enters the battlefield tapped.
{T}: Add {U}, {R}, or {W}.
--
Nomad Outpost
Land
Nomad Outpost enters the battlefield tapped.
{T}: Add {R}, {W}, or {B}.
--
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}.
{2}
Orzhov Signet
Artifact
{1}, {T}: Add {W}{B}.
--
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.)
{2}
Pillar of Origins
Artifact
As Pillar of Origins enters the battlefield, choose a creature type.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.
--
Pillar of the Paruns
Land
{T}: Add one mana of any color. Spend this mana only to cast a multicolored spell.
--
Prismatic Vista
Land
{T}, Pay 1 life, Sacrifice Prismatic Vista: Search your library for a basic land card, put it onto the battlefield, then shuffle.
{4}{U}
Psionic Sliver
Creature - Sliver
All Sliver creatures have "{T}: This creature deals 2 damage to any target and 3 damage to itself."
2 /
2
{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
{2}
Rakdos Signet
Artifact
{1}, {T}: Add {B}{R}.
{6}
Ramos, Dragon Engine
Legendary Artifact Creature - Dragon
Flying
Whenever you cast a spell, put a +1/+1 counter on Ramos, Dragon Engine for each of that spell's colors.
Remove five +1/+1 counters from Ramos: Add {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}. Activate only once each turn.
4 /
4
--
Sandsteppe Citadel
Land
Sandsteppe Citadel enters the battlefield tapped.
{T}: Add {W}, {B}, or {G}.
--
Savage Lands
Land
Savage Lands enters the battlefield tapped.
{T}: Add {B}, {R}, or {G}.
--
Seaside Citadel
Land
Seaside Citadel enters the battlefield tapped.
{T}: Add {G}, {W}, or {U}.
{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
{2}
Selesnya Signet
Artifact
{1}, {T}: Add {G}{W}.
{2}
Simic Signet
Artifact
{1}, {T}: Add {G}{U}.
{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
{4}{U}
Synapse Sliver
Creature - Sliver
Whenever a Sliver deals combat damage to a player, its controller may draw a card.
3 /
3
{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
{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
{4}{R}
Thorncaster Sliver
Creature - Sliver
Sliver creatures you control have "Whenever this creature attacks, it deals 1 damage to any target."
2 /
2
{3}{B}
Toxin Sliver
Creature - Sliver
Whenever a Sliver deals combat damage to a creature, destroy that creature. It can't be regenerated.
3 /
3
--
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.