Whenever a Sliver creature you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays .

All Slivers have "When this permanent enters the battlefield, you may fateseal 1." (To fateseal 1, its controller looks at the top card of an opponent's library, then they may put that card on the bottom of that library.)

All Slivers have ", Sacrifice this permanent: Draw a card."

All Slivers have ": Target player mills a card."

All Sliver creatures have shadow. (They can block or be blocked by only creatures with shadow.)

Whenever a Sliver deals combat damage to a player, its controller may draw a card.

Sliver creatures you control have "When this creature enters the battlefield, goad target creature an opponent controls." (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

All Sliver creatures have flying.