Psychatog

Discard a card: Psychatog gets +1/+1 until end of turn.
Exile two cards from your graveyard: Psychatog gets +1/+1 until end of turn.

Crypt Creeper

Sacrifice Crypt Creeper: Exile target card from a graveyard.

Obsessive Search

Draw a card.
Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Organ Grinder

{T}, Exile three cards from your graveyard: Target player loses 3 life.

Cephalid Illusionist

Whenever Cephalid Illusionist becomes the target of a spell or ability, mill three cards.
{2}{U}, {T}: Prevent all combat damage that would be dealt to and dealt by target creature you control this turn.

Cephalid Broker

{T}: Target player draws two cards, then discards two cards.

Cephalid Looter

{T}: Target player draws a card, then discards a card.

Aquamoeba

Discard a card: Switch Aquamoeba's power and toughness until end of turn.

Compulsion

{1}{U}, Discard a card: Draw a card.
{1}{U}, Sacrifice Compulsion: Draw a card.

Zombie Assassin

{T}, Exile two cards from your graveyard and Zombie Assassin: Destroy target nonblack creature. It can't be regenerated.

Swamp

Afflict

Target creature gets -1/-1 until end of turn.
Draw a card.

Balshan Collaborator

Flying
{B}: Balshan Collaborator gets +1/+1 until end of turn.

Skywing Aven

Flying
Discard a card: Return Skywing Aven to its owner's hand.

Cephalid Vandal

At the beginning of your upkeep, put a shred counter on Cephalid Vandal. Then mill a card for each shred counter on Cephalid Vandal.

Island

Painbringer

{T}, Exile any number of cards from your graveyard: Target creature gets -X/-X until end of turn, where X is the number of cards exiled this way.

Chainer's Edict

Target player sacrifices a creature of their choice.
Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Breakthrough

Draw four cards, then choose X cards in your hand and discard the rest.

Churning Eddy

Return target creature and target land to their owners' hands.

Cephalid Aristocrat

Whenever Cephalid Aristocrat becomes the target of a spell or ability, mill two cards.

Tainted Isle

{T}: Add {C}.
{T}: Add {U} or {B}. Activate only if you control a Swamp.

Morgue Theft

Return target creature card from your graveyard to your hand.
Flashback {4}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Careful Study

False Memories

Mill seven cards. At the beginning of the next end step, exile seven cards from your graveyard.