Altar of the Brood

Whenever another permanent you control enters, each opponent mills a card.

Heartless Summoning

Creature spells you cast cost {2} less to cast.
Creatures you control get -1/-1.

Liliana's Specter

Flying
When Liliana's Specter enters, each opponent discards a card.

Diabolic Edict

Target player sacrifices a creature of their choice.

Altar's Reap

As an additional cost to cast this spell, sacrifice a creature.
Draw two cards.

Mind Sludge

Target player discards a card for each Swamp you control.

Wight of Precinct Six

Wight of Precinct Six gets +1/+1 for each creature card in your opponents' graveyards.

Duskmantle Guildmage

{1}{U}{B}: Whenever a card is put into an opponent's graveyard from anywhere this turn, that player loses 1 life.
{2}{U}{B}: Target player mills two cards.

Liliana's Caress

Whenever an opponent discards a card, that player loses 2 life.

Myr Retriever

When Myr Retriever dies, return another target artifact card from your graveyard to your hand.

Watery Grave

({T}: Add {U} or {B}.)
As Watery Grave enters, you may pay 2 life. If you don't, it enters tapped.

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Mind Rot

Returned Reveler

When Returned Reveler dies, each player mills three cards.

Diabolic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Dark Ritual

Blood Seeker

Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Horrifying Revelation

Target player discards a card, then mills a card.

Doom Blade

Mindcrank

Whenever an opponent loses life, that player mills that many cards. (Damage causes loss of life.)

Final Parting

Search your library for two cards. Put one into your hand and the other into your graveyard. Then shuffle.

Vampire Nighthawk

Flying
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Grasp of Darkness

Target creature gets -4/-4 until end of turn.

Gatekeeper of Malakir

Kicker {B} (You may pay an additional {B} as you cast this spell.)
When this creature enters, if it was kicked, target player sacrifices a creature of their choice.

Distress

Target player reveals their hand. You choose a nonland card from it. That player discards that card.