Whenever you cycle or discard a card, you may pay {1}. If you do, each opponent loses 2 life and you gain 2 life.

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life.

Flying Discard a card: Add {B}.

At the beginning of each player's upkeep, that player returns a permanent they control to its owner's hand unless they pay 2 life.

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.

{X}: Crypt Rats deals X damage to each creature and each player. Spend only black mana on X.

Whenever you pay life, put that many blood counters on Font of Agonies. {1}{B}, Remove four blood counters from Font of Agonies: Destroy target creature.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.) Equip {1}

{T}, Pay 3 life: Flip a coin. If you win the flip, you gain 6 life.

Flying, deathtouch, lifelink

({B/P} can be paid with either {B} or 2 life.) Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.)

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

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

{T}: Add {C}. {T}, Pay 1 life: Add {B}. {2}{B}{B}, {T}, Sacrifice a Desert: Put two -1/-1 counters on target creature an opponent controls. Activate only as a sorcery.

Indestructible Equipped creature has indestructible. Equip {2}

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.

Return target creature card from your graveyard to the battlefield. It gains haste until your next turn.

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.)

Enchant creature or planeswalker you control When enchanted permanent dies or is put into exile, return that card to the battlefield under your control.

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

Choose two target creature cards in your graveyard. Sacrifice a creature. If you do, return the chosen cards to the battlefield tapped.

Destroy all creatures, then search target opponent's library for up to three creature cards and put them into their graveyard. Then that player shuffles.

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.

Target player sacrifices a creature. You gain life equal to that creature's toughness. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

{2}, {T}: You gain 5 life. Shuffle Elixir of Immortality and your graveyard into their owner's library.

Eternity Vessel enters the battlefield with X charge counters on it, where X is your life total. Landfall — Whenever a land enters the battlefield under your control, you may have your life total become the number of charge counters on Eternity Vessel.

{T}, Sacrifice Magus of the Mirror: Exchange life totals with target opponent. Activate only during your upkeep.

Flying You can't lose the game and your opponents can't win the game.

Each player's life total becomes the lowest life total among all players.

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

Flying, trample Pay 2 life: Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Whenever Ebonblade Reaper attacks, you lose half your life, rounded up. Whenever Ebonblade Reaper deals combat damage to a player, that player loses half their life, rounded up. Morph {3}{B}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

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.

Flying Pay 1 life: Regenerate Mischievous Poltergeist.

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.

Corrupt deals damage to any target equal to the number of Swamps you control. You gain life equal to the damage dealt this way.

Each opponent loses X life. You gain life equal to the life lost this way.

When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)

Flying Cumulative upkeep—Gain control of a land you don't control. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Herald of Leshrac gets +1/+1 for each land you control but don't own. When Herald of Leshrac leaves the battlefield, each player gains control of each land they own that you control.

Lands you control have "{T}: Add one mana of any color." {T}: Add one mana of any color.

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}.

Converge — Crystalline Crawler enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it. Remove a +1/+1 counter from Crystalline Crawler: Add one mana of any color. {T}: Put a +1/+1 counter on Crystalline Crawler.

Add {B}{B}{B}.

{T}: Add one mana of any color that a land an opponent controls could produce.

{T}: Add three mana of any one color.

{T}: Add {C}{C}. {2}, {T}, Sacrifice Hedron Archive: Draw two cards.

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

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

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

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

{T}: Add {C}. You gain 1 life.

({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.

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

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