Whenever you cast a spell, you gain 1 life for each spell you've cast this turn. Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

Sacrifice a creature: Add {C}{C}.

You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

{T}, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.

{T}, Sacrifice Lotus Petal: Add one mana of any color.

At the beginning of your upkeep, flip a coin. If you lose the flip, Mana Crypt deals 3 damage to you. {T}: Add {C}{C}.

{T}: Add {C}. {1}, {T}, Sacrifice Mind Stone: Draw a card.

Sacrifice a creature: Add one mana of any color.

As Prism Ring enters the battlefield, choose a color. Whenever you cast a spell of the chosen color, you gain 1 life.

{1}: Look at the top three cards of your library, then put them back in any order. {T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

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

As Throne of Eldraine enters the battlefield, choose a color. {T}: Add four mana of the chosen color. Spend this mana only to cast monocolored spells of that color. {3}, {T}: Draw two cards. Spend only mana of the chosen color to activate this ability.

Whenever Ayara, First of Locthwain or another black creature enters the battlefield under your control, each opponent loses 1 life and you gain 1 life. {T}, Sacrifice another black creature: Draw a card.

Flying 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.)

Sacrifice Blood Pet: Add {B}.

{B}, {T}, Discard a card: Add {B}{B}{B}.

When Cauldron Familiar enters the battlefield, each opponent loses 1 life and you gain 1 life. Sacrifice a Food: Return Cauldron Familiar from your graveyard to the battlefield.

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}.

As Diamond Mare enters the battlefield, choose a color. Whenever you cast a spell of the chosen color, you gain 1 life.

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.) Other creatures you control have extort. (If a creature has multiple instances of extort, each triggers separately.)

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.)

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.) {T}, Pay 2 life: Remove a counter from target nonland permanent.

{B}, Pay 2 life: Draw a card.

Add {B}{B}{B}. Threshold — Add {B}{B}{B}{B}{B} instead if seven or more cards are in your graveyard.

Exile target card from a graveyard. If it was a creature card, you gain 3 life. Otherwise, you draw a card. Escape—{3}{B}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

As an additional cost to cast this spell, sacrifice a creature. Add {B}{B}{B}{B}.

Add {B}{B}{B}.

As an additional cost to cast this spell, sacrifice an artifact or creature. Draw two cards and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

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

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

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

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

Search your library and graveyard for five cards and exile the rest. Put the chosen cards on top of your library in any order. You lose half your life, rounded up.

You draw two cards and you lose 2 life.

Target creature gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.) Draw a card.

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

Choose two target players. Each of them searches their library for a card, then shuffles and puts that card on top.

Target player draws two cards and loses 2 life.

Barren Moor enters the battlefield tapped. {T}: Add {B}. Cycling {B} ({B}, Discard this card: Draw a card.)

{B}, Pay 1 life: Add one mana of any color.

Carrion Feeder can't block. Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

{1}, {T}, Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color. When Chromatic Star is put into a graveyard from the battlefield, draw a card.

{T}, Sacrifice Conjurer's Bauble: Put up to one target card from your graveyard on the bottom of your library. Draw a card.

Exile target card from a graveyard. Draw a card.

Draw four cards. You lose half your life, rounded up.

{1}{B}, {T}, Discard a card: Create a 2/2 black Zombie creature token. Tap three untapped Zombies you control: You draw a card and you lose 1 life.

Look at the top three cards of target player's library. Exile any number of those cards, then put the rest back in any order. Transmute {1}{B}{B} ({1}{B}{B}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Sacrifice a creature or land. Draw a card.

Exile target card from a graveyard. Cycling {B} ({B}, Discard this card: Draw a card.)

Gravecrawler can't block. You may cast Gravecrawler from your graveyard as long as you control a Zombie.

Whenever you cycle or discard another card, Horror of the Broken Lands gets +2/+1 until end of turn. Cycling {B} ({B}, Discard this card: Draw a card.)

When Ichor Wellspring enters the battlefield or is put into a graveyard from the battlefield, draw a card.

Draw four cards. You lose half your life, rounded up.

Whenever an opponent casts a green spell, you may pay {B}{B}. If you do, look at that player's hand and choose a card from it. The player discards that card. {B}{B}: Return Leshrac's Sigil to its owner's hand.

Cycling {B} ({B}, Discard this card: Draw a card.)

Mana Vault doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault. At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you. {T}: Add {C}{C}{C}.

{T}, Sacrifice Nihil Spellbomb: Exile target player's graveyard. When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Search your library for a card, put that card into your hand, then shuffle. Cycling {B} ({B}, Discard this card: Draw a card.)

Menace (This creature can't be blocked except by two or more creatures.) When Relentless Dead dies, you may pay {B}. If you do, return it to its owner's hand. When Relentless Dead dies, you may pay {X}. If you do, return another target Zombie creature card with mana value X from your graveyard to the battlefield.

Exile up to three target cards from a single graveyard. Cycling {B} ({B}, Discard this card: Draw a card.)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Sacrifice a creature: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)