"When struck, its hide shimmers through sequences of color—a signaling language I am eager to unravel."
—Rukarumel, field journal

Opaline Sliver

All Slivers have "Whenever this permanent becomes the target of a spell an opponent controls, you may draw a card."

Secret Lair Drop

Time Spiral

All Slivers have "Whenever this creature becomes the target of a spell an opponent controls, you may draw a card."

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.