Skywing Aven

Flying
Discard a card: Return this creature to its owner's hand.

Cephalid Aristocrat

Whenever this creature becomes the target of a spell or ability, mill two cards.

Careful Study

Psychatog

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

Organ Grinder

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

Compulsion

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

Island

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.)

Balshan Collaborator

Flying
{B}: This creature gets +1/+1 until end of turn.

Afflict

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

False Memories

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

Tainted Isle

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

Cephalid Broker

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

Cephalid Illusionist

Whenever this creature 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.

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.

Crypt Creeper

Sacrifice this creature: Exile target card from a graveyard.

Churning Eddy

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

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.)

Swamp

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.)

Breakthrough

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

Aquamoeba

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

Zombie Assassin

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

Cephalid Looter

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

Cephalid Vandal

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