Boomerang

Return target permanent to its owner's hand.

Island

Force Spike

Counter target spell unless its controller pays {1}.

Heart Sliver

Bad River

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

Mind Rot

Inspiration

Rocky Tar Pit

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

Mana Leak

Counter target spell unless its controller pays {3}.

Clot Sliver

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

Metallic Sliver

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.

Mindwhip Sliver

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

Winged Sliver

Mountain

Unsummon

Return target creature to its owner's hand.

Swamp

Mnemonic Sliver

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