"Sure, I've seen agents of the Cabal here and there. Well, not here, and certainly not in any of the sliver labs. Oh dear, I've said too much."
—Apprentice researcher

Spectral Sliver

All Sliver creatures have "{2}: This creature gets +1/+1 until end of turn."

The List

Premium Deck Series: Slivers

Salvat 2005

Legions

All Slivers have "{2}: This creature gets +1/+1 until end of turn."

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.