All Slivers have "Sacrifice this permanent: Add {B}{B}."

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."

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

All Slivers have "At the beginning of your upkeep, this permanent deals 1 damage to you."

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."

All Sliver creatures have shadow. (They can block or be blocked by only creatures with shadow.)

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

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

Whenever a Sliver deals combat damage to a player, its controller may draw a card.

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

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

({T}: Add {G}.)

({T}: Add {U}.)

({T}: Add {R}.)

({T}: Add {W}.)