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.)
"When a sliver of this breed enters the hive, the others claw each other in frenzied fits, thereby ensuring their rapid growth."
—Rukarumel, field journal
(01/07/2013)
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.
(19/03/2021)
If multiple sources deal damage to a Sliver at the same time and that Sliver survives the damage, it gets only one +1/+1 counter despite its impressive efforts.
(01/07/2013)
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.
