All Slivers have "{1}, Sacrifice this permanent: This permanent deals 1 damage to any target." All Slivers have "{1}, Sacrifice this permanent: Prevent the next 1 damage that would be dealt to target player, planeswalker, or Sliver creature this turn."

Sliver creatures you control have flying and haste.

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

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

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

All Sliver creatures get +1/+1.

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