All Slivers have "{2}: Regenerate this permanent."

All Sliver creatures have haste.

All Slivers have "{2}, Sacrifice this permanent: Target player discards a card at random. Activate only as a sorcery."

All Slivers have "{2}, Sacrifice this permanent: Draw a card."

Return target permanent to its owner's hand.

Counter target spell unless its controller pays {1}.

Target player draws two cards.

Counter target spell unless its controller pays {3}.

Bad River enters the battlefield tapped. {T}, Sacrifice Bad River: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

({T}: Add {U}.)

({T}: Add {R}.)

Rocky Tar Pit enters the battlefield tapped. {T}, Sacrifice Rocky Tar Pit: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

Target player reveals the top four cards of their library. You choose two of those cards and put them into that player's graveyard. Put the rest on top of their library in any order.