Mindwhip Sliver

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

Bad River

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.

Mana Leak

Counter target spell unless its controller pays {3}.

Mnemonic Sliver

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

Metallic Sliver

Inspiration

Boomerang

Return target permanent to its owner's hand.

Clot Sliver

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

Mind Rot

Unsummon

Return target creature to its owner's hand.

Heart Sliver

Winged Sliver

Mountain

Bamboozle

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.

Swamp

Force Spike

Counter target spell unless its controller pays {1}.

Rocky Tar Pit

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.