Crystalline Sliver
Creature — Sliver
All Slivers have shroud. (They can't be the targets of spells or abilities.)
Bred as living shields, these slivers have proven unruly—they know they cannot be caught.
Allen Williams
Rulings
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.
(wotc • 2013-07-01)
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.
(wotc • 2013-07-01)
The ability only applies while this card is on the battlefield.
(wotc • 2004-10-04)
Rulings
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.
(wotc • 2013-07-01)
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.
(wotc • 2013-07-01)
The ability only applies while this card is on the battlefield.
(wotc • 2004-10-04)