Mire in Misery

Each opponent sacrifices a creature or enchantment of their choice.

Ornithopter

Dread Return

Return target creature card from your graveyard to the battlefield.
Flashback—Sacrifice three creatures. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Reanimate

Put target creature card from a graveyard onto the battlefield under your control. You lose life equal to its mana value.

Sign in Blood

Target player draws two cards and loses 2 life.

Swamp

Jet Medallion

Black spells you cast cost {1} less to cast.

Cursed Totem

Activated abilities of creatures can't be activated.

Thorn of Amethyst

Noncreature spells cost {1} more to cast.

Pawn of Ulamog

Whenever this creature or another nontoken creature you control dies, you may create a 0/1 colorless Eldrazi Spawn creature token. It has "Sacrifice this token: Add {C}."

Ophiomancer

At the beginning of each upkeep, if you control no Snakes, create a 1/1 black Snake creature token with deathtouch.

Sphere of Resistance

Harvester of Souls

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Whenever another nontoken creature dies, you may draw a card.

Ichor Wellspring

When this artifact enters or is put into a graveyard from the battlefield, draw a card.

Reassembling Skeleton

{1}{B}: Return this card from your graveyard to the battlefield tapped.

Phoenix Fleet Airship

Flying
At the beginning of your end step, if you sacrificed a permanent this turn, create a token that's a copy of this Vehicle.
As long as you control eight or more permanents named Phoenix Fleet Airship, this Vehicle is an artifact creature.
Crew 1

Innocent Blood

Each player sacrifices a creature of their choice.

Skullclamp

Equipped creature gets +1/-1.
Whenever equipped creature dies, draw two cards.
Equip {1}

Burglar Rat

When this creature enters, each opponent discards a card.

Night's Whisper

Nine-Lives Familiar

This creature enters with eight revival counters on it if you cast it.
When this creature dies, if it had a revival counter on it, return it to the battlefield with one fewer revival counter on it at the beginning of the next end step.

Infernal Grasp

Destroy target creature. You lose 2 life.

Infestation Sage

When this creature dies, create a 1/1 black and green Insect creature token with flying.

Fake Your Own Death

Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield tapped under its owner's control and you create a Treasure token." (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Mindslicer

When this creature dies, each player discards their hand.

Rise of the Dark Realms

Put all creature cards from all graveyards onto the battlefield under your control.

Braids, Cabal Minion

At the beginning of each player's upkeep, that player sacrifices an artifact, creature, or land of their choice.

Solemn Simulacrum

When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
When this creature dies, you may draw a card.