Enchant creature card in a graveyard

When Animate Dead enters the battlefield, if it's on the battlefield, it loses "enchant creature card in a graveyard" and gains "enchant creature put onto the battlefield with Animate Dead." Return enchanted creature card to the battlefield under your control and attach Animate Dead to it. When Animate Dead leaves the battlefield, that creature's controller sacrifices it.

Enchanted creature gets -1/-0.

{1}{B}: Regenerate Augur of Skulls.

Sacrifice Augur of Skulls: Target player discards two cards. Activate only during your upkeep.

Each player discards all the cards in their hand, then creates that many 2/2 black Zombie creature tokens.

Each player sacrifices two creatures.

({2/B} can be paid with any two mana or with {B}. This card's mana value is 6.)

Search your library for a card with mana value less than or equal to the number of lands you control, reveal it, put it into your hand, then shuffle.

When Big Game Hunter enters the battlefield, destroy target creature with power 4 or greater. It can't be regenerated.

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

Whenever you discard a creature card, create a 2/2 black Zombie creature token.

Whenever you discard a land card, add {B}{B}.

Whenever you discard a noncreature, nonland card, draw a card.

At the beginning of each player's upkeep, that player discards a card at random.

Until end of turn, whenever a player taps a Swamp for mana, that player adds an additional {B}.

Search your library for up to three creature cards, put them into your graveyard, then shuffle.

{2}, {T}: Add {B} for each Swamp you control.

{T}: Add {C}.

{3}, {T}: Add {B} for each basic Swamp you control.

Return target black creature card from your graveyard to your hand.

Madness {0} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Council's dilemma -- Starting with you, each player votes for death or taxes. Each opponent sacrifices a creature for each death vote and discards a card for each taxes vote.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)

Whenever you tap a Swamp for mana, add an additional {B}.

Each player discards all the cards in their hand, then draws that many cards minus one.

Add {B}{B}{B}.

Each player loses X life, discards X cards, sacrifices X creatures, then sacrifices X lands.

Each player discards three cards.

When Demon's Disciple enters the battlefield, each player sacrifices a creature or planeswalker.

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

At the beginning of each end step, each player who tapped a land for mana this turn sacrifices a land. Desolation deals 2 damage to each player who sacrificed a Plains this way.

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.)

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

When Fleshbag Marauder enters the battlefield, each player sacrifices a creature.

Transfigure {1}{B}{B} ({1}{B}{B}, Sacrifice this creature: Search your library for a creature card with the same mana value as this creature, put that card onto the battlefield, then shuffle. Transfigure only as a sorcery.)

Each player loses half their life, then discards half the cards in their hand, then sacrifices half the creatures they control. Round up each time.

{T}: Add {C}.

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

At the beginning of each player's upkeep, that player loses 1 life and discards a card.

Hellbent -- Skip your upkeep step if you have no cards in hand.

Madness {2}{B}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Each player sacrifices a creature.

You have no maximum hand size.

If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.

+1: Each player discards a card.

-2: Target player sacrifices a creature.

-6: Separate all permanents target player controls into two piles. That player sacrifices all permanents in the pile of their choice.

Each opponent sacrifices a creature. If you control a Liliana planeswalker, each opponent also discards a card.

Lifelink

Whenever another nontoken creature you control dies, exile Liliana, Heretical Healer, then return her to the battlefield transformed under her owner's control. If you do, create a 2/2 black Zombie creature token.

+2: Each player discards a card.

-X: Return target nonlegendary creature card with mana value X from your graveyard to the battlefield.

-8: You get an emblem with "Whenever a creature dies, return it to the battlefield under your control at the beginning of the next end step."

Enchant creature

At the beginning of the end step of enchanted creature's controller, that player sacrifices that creature.

{2}, {T}: Add {B} for each Swamp you control.

Whenever a land an opponent controls is tapped for mana, tap all lands that player controls that could produce any type of mana that land could produce.

Undergrowth -- Search your library for a black card with mana value less than or equal to the number of creature cards in your graveyard, reveal it, put it into your hand, then shuffle.

When Merciless Executioner enters the battlefield, each player sacrifices a creature.

When Mindslicer dies, each player discards their hand.

At the beginning of each player's upkeep, that player discards a card.

Skip your draw step.

Whenever you discard a card, exile that card from your graveyard.

Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.

As long as Necrotic Ooze is on the battlefield, it has all activated abilities of all creature cards in all graveyards.

Flash

You control your opponents while they're searching their libraries.

While an opponent is searching their library, they exile each card they find. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them.

{T}: Add {C}{C}.

Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.

At the beginning of your upkeep, you draw a card and you lose 1 life.

When Phyrexian Devourer's power is 7 or greater, sacrifice it.

Exile the top card of your library: Put X +1/+1 counters on Phyrexian Devourer, where X is the exiled card's mana value.

Trample

Whenever a source deals damage to Phyrexian Obliterator, that source's controller sacrifices that many permanents.

Flying

{2}, {Q}: Add one mana of any color. ({Q} is the untap symbol.)

When Plaguecrafter enters the battlefield, each player sacrifices a creature or planeswalker. Each player who can't discards a card.

Each player loses a third of their life, then discards a third of the cards in their hand, then sacrifices a third of the creatures they control, then sacrifices a third of the lands they control. Round up each time.

Until end of turn, lands you control gain "Sacrifice this land: Add {B}."

Flying, haste

Whenever Rankle, Master of Pranks deals combat damage to a player, choose any number --

• Each player discards a card.

• Each player loses 1 life and draws a card.

• Each player sacrifices a creature.

Target player discards a card.

Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

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

When Rotting Rats enters the battlefield, each player discards a card.

Unearth {1}{B} ({1}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Each player loses 1 life, discards a card, sacrifices a creature, then sacrifices a land.

At the beginning of your upkeep, you may put a soot counter on Smokestack.

At the beginning of each player's upkeep, that player sacrifices a permanent for each soot counter on Smokestack.

{T}: Add {C}{C}.

{T}, Pay 1 life: Counter target white spell.

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {B}.)

Each other player discards a card. You draw a card for each card discarded this way.

Whenever another creature dies, or a creature card is put into a graveyard from anywhere other than the battlefield, or a creature card leaves your graveyard, Syr Konrad, the Grim deals 1 damage to each opponent.

{1}{B}: Each player mills a card. (They each put the top card of their library into their graveyard.)

At the beginning of each end step, if an opponent discarded a card this turn, you draw a card and you lose 1 life.

{4}{B}{B}: Each opponent with no cards in hand loses 10 life.

{B}, Discard a creature card: Return target creature card from your graveyard to your hand.

Triskelion enters the battlefield with three +1/+1 counters on it.

Remove a +1/+1 counter from Triskelion: It deals 1 damage to any target.

You may exile a black card from your hand rather than pay this spell's mana cost.

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

{T}: Add {B}.

{T}: Target creature loses first strike or swampwalk until end of turn.

Whenever an opponent discards a creature card, create a 2/2 black Zombie creature token.

Whenever an opponent discards a land card, add {B}{B}.

Whenever an opponent discards a noncreature, nonland card, draw a card.

Players can't play lands.

Lands can't enter the battlefield.

At the beginning of each upkeep, any player may sacrifice two lands or have Worms of the Earth deal 5 damage to that player. If a player does either, destroy Worms of the Earth.