Crypt Sliver

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

Winged Sliver

Heart Sliver

Simic Guildgate

Simic Guildgate enters tapped.
{T}: Add {G} or {U}.

Forest

Plains

Mountain

Crystalline Sliver

All Slivers have shroud. (They can't be the targets of spells or abilities.)

Island

Selesnya Guildgate

Selesnya Guildgate enters tapped.
{T}: Add {G} or {W}.

Manaweft Sliver

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

Swamp

Muscle Sliver

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.)

Spined Sliver

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

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.)

Orzhov Guildgate

Orzhov Guildgate enters tapped.
{T}: Add {W} or {B}.

Syphon Sliver

Sliver creatures you control have lifelink. (Damage dealt by a Sliver creature you control also causes you to gain that much life.)

Sentinel Sliver

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

Might Sliver

Golgari Guildgate

Golgari Guildgate enters tapped.
{T}: Add {B} or {G}.

Sliver Hive

{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.

Dimir Guildgate

Dimir Guildgate enters tapped.
{T}: Add {U} or {B}.

Plated Sliver

Gruul Guildgate

Gruul Guildgate enters tapped.
{T}: Add {R} or {G}.

Telekinetic Sliver

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

Izzet Guildgate

Izzet Guildgate enters tapped.
{T}: Add {U} or {R}.

Boros Guildgate

Boros Guildgate enters tapped.
{T}: Add {R} or {W}.

Rakdos Guildgate

Rakdos Guildgate enters tapped.
{T}: Add {B} or {R}.

Two-Headed Sliver

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

Azorius Guildgate

Azorius Guildgate enters tapped.
{T}: Add {W} or {U}.

Sliver Legion

All Sliver creatures get +1/+1 for each other Sliver on the battlefield.

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.)