When Abyssal Gatekeeper dies, each player sacrifices a creature.

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.

+1: You gain life equal to the number of creatures you control plus the number of planeswalkers you control.

-2: Create a 2/2 white Cat Soldier creature token named Ajani's Pridemate with "Whenever you gain life, put a +1/+1 counter on Ajani's Pridemate."

0: If you have at least 15 life more than your starting life total, exile Ajani, Strength of the Pride and each artifact and creature your opponents control.

If you would gain life, you gain twice that much life instead.

If you would draw a card except the first one you draw in each of your draw steps, draw two cards instead.

At the beginning of each end step, if you gained 4 or more life this turn, create a 4/4 white Angel creature token with flying.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

Flying

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Whenever you gain life, put a +1/+1 counter on each creature you control.

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

Protection from black and from red

Whenever another creature enters the battlefield, you may gain 1 life.

Creatures your opponents control enter the battlefield tapped.

Whenever a creature enters the battlefield under an opponent's control, you gain 1 life.

Commander creatures you control get +2/+2 and have indestructible.

Whenever a creature dies, put a charge counter on Black Market.

At the beginning of your precombat main phase, add {B} for each charge counter on Black Market.

{T}: Add {C}.

{3}{W}, {T}, Sacrifice Blighted Steppe: You gain 2 life for each creature you control.

Whenever Blood Artist or another creature dies, target player loses 1 life and you gain 1 life.

Flying

Whenever you gain life, put a +1/+1 counter on Bloodthirsty Aerialist.

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

Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life.

If you would gain life, you gain twice that much life instead.

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

{T}: Add one mana of any color.

{T}: Add one mana of any color in your commander's color identity.

{T}: Add one mana of any color in your commander's color identity.

Sacrifice Commander's Sphere: Draw a card.

Whenever another creature dies, you may gain 1 life.

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

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

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

If one or more creature tokens would be created under your control, that many 4/4 white Angel creature tokens with flying and vigilance are created instead.

Lifelink

Whenever another creature dies, put a +1/+1 counter on Elenda, the Dusk Rose.

When Elenda dies, create X 1/1 white Vampire creature tokens with lifelink, where X is Elenda's power.

When Endless Cockroaches dies, return it to its owner's hand.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Sacrifice a creature: Regenerate target creature.

({T}: Add {W} or {B}.)

As Godless Shrine enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Whenever a creature you control dies, each other player sacrifices a creature.

Vigilance

Afterlife 1 (When this creature dies, create a 1/1 white and black Spirit creature token with flying.)

Isolated Chapel enters the battlefield tapped unless you control a Plains or a Swamp.

{T}: Add {W} or {B}.

Kabira Crossroads enters the battlefield tapped.

When Kabira Crossroads enters the battlefield, you gain 2 life.

{T}: Add {W}.

Whenever an opponent casts a noncreature spell, that player loses 2 life and you gain 2 life.

Flying

When Kokusho, the Evening Star dies, each opponent loses 5 life. You gain life equal to the life lost this way.

Partner with Regna, the Redeemer (When this creature enters the battlefield, target player may put Regna into their hand from their library, then shuffle.)

{B}, Sacrifice X creatures: Target player draws X cards and gains X life. Put X +1/+1 counters on Krav, the Unredeemed.

Create X 1/1 white Soldier creature tokens. If X is 5 or more, destroy all other creatures.

Memorial to Folly enters the battlefield tapped.

{T}: Add {B}.

{2}{B}, {T}, Sacrifice Memorial to Folly: Return target creature card from your graveyard to your hand.

Memorial to Glory enters the battlefield tapped.

{T}: Add {W}.

{3}{W}, {T}, Sacrifice Memorial to Glory: Create two 1/1 white Soldier creature tokens.

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

Afterlife 2 (When this creature dies, create two 1/1 white and black Spirit creature tokens with flying.)

You gain 1 life. Target creature gets -X/-X until end of turn, where X is the amount of life you gained this turn.

Oathsworn Vampire enters the battlefield tapped.

You may cast Oathsworn Vampire from your graveyard if you gained life this turn.

White creature spells you cast cost {1} less to cast.

Whenever you cast a creature spell, create a 1/1 white Warrior creature token with vigilance.

{T}: Add one mana of any color.

{T}: Add {W} or {B}.

{W}{B}, {T}, Sacrifice Orzhov Cluestone: Draw a card.

Deathtouch

Afterlife 1 (When this creature dies, create a 1/1 white and black Spirit creature token with flying.)

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

Sacrifice a creature: Add one mana of any color.

{T}: Add {C}.

{T}, Sacrifice a creature: Add {B}{B}.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

Polluted Mire enters the battlefield tapped.

{T}: Add {B}.

Cycling {2} ({2}, Discard this card: Draw a card.)

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.)

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

When Radiant Fountain enters the battlefield, you gain 2 life.

{T}: Add {C}.

Flying

At the beginning of each end step, if you gained life this turn, create a 1/1 black Bat creature token with flying.

Partner with Krav, the Unredeemed (When this creature enters the battlefield, target player may put Krav into their hand from their library, then shuffle.)

Flying

At the beginning of each end step, if your team gained life this turn, create two 1/1 white Warrior creature tokens.

You have no maximum hand size.

{T}: Add {C}.

Flying

At the beginning of each end step, if you gained 5 or more life this turn, create a 4/4 white Angel creature token with flying and vigilance.

{3}{W}{W}{W}: Until end of turn, Resplendent Angel gets +2/+2 and gains lifelink.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I, II -- Create two 0/1 black Cleric creature tokens.

III -- Create a 6/6 black Demon creature token with flying, trample, and "At the beginning of your upkeep, sacrifice another creature. If you can't, this creature deals 6 damage to you."

Scoured Barrens enters the battlefield tapped.

When Scoured Barrens enters the battlefield, you gain 1 life.

{T}: Add {W} or {B}.

When Sengir Autocrat enters the battlefield, create three 0/1 black Serf creature tokens.

When Sengir Autocrat leaves the battlefield, exile all Serf tokens.

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

You gain life equal to the sacrificed creature's toughness. Destroy target creature an opponent controls.

{T}: Add {B}.

{B}, {T}: Target legendary creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Equipped creature gets +1/-1.

Whenever equipped creature dies, draw two cards.

Equip {1}

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

Whenever another creature enters the battlefield, you gain 1 life.

Whenever another creature enters the battlefield, you may gain 1 life.

Whenever another creature enters the battlefield under your control, you may gain 1 life.

Whenever a creature enters the battlefield under an opponent's control, you may have that player lose 1 life.

({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 {C}.

{T}: Add {W} or {B}. Activate only if you control a Swamp.

Temple of Silence enters the battlefield tapped.

When Temple of Silence enters the battlefield, scry 1.

{T}: Add {W} or {B}.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

If a creature dying causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Creature tokens you control have vigilance and lifelink.

Sacrifice three white creatures: Exile target creature.

Whenever another black creature you control dies, create a 1/1 white Spirit creature token with flying.

You have no maximum hand size.

{T}: Add {C}.

Lifelink (Damage dealt by this creature also causes you to 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.)

Whenever a creature token leaves the battlefield, put a +1/+1 counter on Twilight Drover.

{2}{W}, Remove a +1/+1 counter from Twilight Drover: Create two 1/1 white Spirit creature tokens with flying.

{T}: Add {C}.

{2}{W}{B}, {T}: Creatures you control gain deathtouch and lifelink until end of turn.

You have no maximum hand size.

At the beginning of your upkeep, you gain 1 life for each card in your hand.

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

{1}{W}{B}: Target creature gains lifelink until end of turn.

{1}{W}{B}: Whenever you gain life this turn, each opponent loses that much life.

{T}: Add {C}.

{5}, {T}, Pay 1 life: Create a 1/1 white and black Human Cleric creature token.

{5}, {T}, Sacrifice five creatures: Transform Westvale Abbey, then untap it.

Flying, lifelink, indestructible, haste

Whenever Zulaport Cutthroat or another creature you control dies, each opponent loses 1 life and you gain 1 life.