Fate Unraveler

Whenever an opponent draws a card, Fate Unraveler deals 1 damage to that player.

Boomerang

Return target permanent to its owner's hand.

Eye of Nowhere

Drowned Catacomb

Drowned Catacomb enters tapped unless you control an Island or a Swamp.
{T}: Add {U} or {B}.

Echoing Truth

Return target nonland permanent and all other permanents with the same name as that permanent to their owners' hands.

Shimmering Grotto

{T}: Add {C}.
{1}, {T}: Add one mana of any color.

Rupture Spire

Rupture Spire enters tapped.
When Rupture Spire enters, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.

Ebony Owl Netsuke

At the beginning of each opponent's upkeep, if that player has seven or more cards in hand, Ebony Owl Netsuke deals 4 damage to that player.

Swamp

Island

Kami of the Crescent Moon

At the beginning of each player's draw step, that player draws an additional card.

Vapor Snag

Return target creature to its owner's hand. Its controller loses 1 life.

Submerged Boneyard

Submerged Boneyard enters tapped.
{T}: Add {U} or {B}.

Gigadrowse

Replicate {U} (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)
Tap target permanent.

Howling Mine

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.