
All Slivers have ", Sacrifice this permanent: This permanent deals 1 damage to any target."
All Slivers have ", Sacrifice this permanent: Prevent the next 1 damage that would be dealt to target player, planeswalker, or Sliver creature this turn."
Illustrated by Dany Orizio
Released on February 2, 2007
Abilities that Slivers grant, as well as power/toughness boosts, are cumulative. However, for some abilities, like flying, having more than one instance of the ability doesn't provide any additional benefit.
If the creature type of a Sliver changes so it's no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures.
Note that the first ability can affect any kind of creature, but the second ability can affect only Slivers. Both abilities can affect players.