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.

Gainsay

Innocent Blood

Each player sacrifices a creature of their choice.

Smother

Destroy target creature with mana value 3 or less. It can't be regenerated.

Mana Short

Tap all lands target player controls and that player loses all unspent mana.

Cunning Wish

You may reveal an instant card you own from outside the game and put it into your hand. Exile Cunning Wish.

Slay

Destroy target green creature. It can't be regenerated.
Draw a card.

Swamp

Recoil

Return target permanent to its owner's hand. Then that player discards a card.

Circular Logic

Counter target spell unless its controller pays {1} for each card in your graveyard.
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.)

Hibernation

Return all green permanents to their owners' hands.

Upheaval

Return all permanents to their owners' hands.

Compulsion

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

Zombie Infestation

Discard two cards: Create a 2/2 black Zombie creature token.

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.)

Island

Underground River

{T}: Add {C}.
{T}: Add {U} or {B}. Underground River deals 1 damage to you.

Hydroblast

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Ghastly Demise

Destroy target nonblack creature if its toughness is less than or equal to the number of cards in your graveyard.

Repulse

Return target creature to its owner's hand.
Draw a card.

Force Spike

Counter target spell unless its controller pays {1}.

Cremate

Exile target card from a graveyard.
Draw a card.

Counterspell

Deep Analysis

Target player draws two cards.
Flashback—{1}{U}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Standstill

When a player casts a spell, sacrifice Standstill. If you do, each of that player's opponents draws three cards.

Coffin Purge

Exile target card from a graveyard.
Flashback {B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)