Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.
{5}{B}{G}
Beledros Witherbloom
Legendary Creature - Elder Dragon
Flying
At the beginning of each upkeep, create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life."
Pay 10 life: Untap all lands you control. Activate only once each turn.
4 /
4
{1}{B}
Blood Artist
Creature - Vampire
Whenever Blood Artist or another creature dies, target player loses 1 life and you gain 1 life.
0 /
1
{1}{B}{G}
Blood Researcher
Creature - Vampire Druid
Menace (This creature can't be blocked except by two or more creatures.)
Whenever you gain life, put a +1/+1 counter on Blood Researcher.
2 /
2
{B}{R}
Body Dropper
Creature - Devil Warrior
Whenever you sacrifice another creature, put a +1/+1 counter on Body Dropper.
{B}{R}, Sacrifice another creature: Body Dropper gains menace until end of turn. (It can't be blocked except by two or more creatures.)
2 /
2
{3}{B}{B}{B}
Bolas's Citadel
Legendary Artifact
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.
{5}{G}
Bootleggers' Stash
Artifact
Lands you control have "{T}: Create a Treasure token."
{5}{B}{B}
Butcher of Malakir
Creature - Vampire Warrior
Flying
Whenever Butcher of Malakir or another creature you control dies, each opponent sacrifices a creature.
5 /
4
{2}{G}
Chatterfang, Squirrel General
Legendary Creature - Squirrel Warrior
Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)
If one or more tokens would be created under your control, those tokens plus that many 1/1 green Squirrel creature tokens are created instead.
{B}, Sacrifice X Squirrels: Target creature gets +X/-X until end of turn.
3 /
3
{1}{B/G}
Cram Session
Sorcery
You gain 4 life.
Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)
{B/G}{B/G}{B/G}{B/G}
Daemogoth Titan
Creature - Demon
Whenever Daemogoth Titan attacks or blocks, sacrifice a creature.
11 /
10
{1}{B}{B/G}{G}
Daemogoth Woe-Eater
Creature - Demon
At the beginning of your upkeep, sacrifice a creature.
When you sacrifice Daemogoth Woe-Eater, each opponent discards a card, you draw a card, and you gain 2 life.
7 /
6
{B}{G}
Deadly Brew
Sorcery
Each player sacrifices a creature or planeswalker. If you sacrificed a permanent this way, you may return another permanent card from your graveyard to your hand.
{5}{B}{B}
Defiant Bloodlord
Creature - Vampire
Flying
Whenever you gain life, target opponent loses that much life.
4 /
5
{1}{B}
Demonic Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle.
{1}{B}
Diabolic Intent
Sorcery
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.
{2}{B}{B}
Diabolic Tutor
Sorcery
Search your library for a card, put that card into your hand, then shuffle.
{B}{G}
Dina, Soul Steeper
Legendary Creature - Dryad Druid
Whenever you gain life, each opponent loses 1 life.
{1}, Sacrifice another creature: Dina, Soul Steeper gets +X/+0 until end of turn, where X is the sacrificed creature's power.
1 /
3
{4}{B}
Epicure of Blood
Creature - Vampire
Whenever you gain life, each opponent loses 1 life.
4 /
4
{G}
Essence Warden
Creature - Elf Shaman
Whenever another creature enters the battlefield, you gain 1 life.
1 /
1
{X}{X}{G}{G}
Exponential Growth
Sorcery
Until end of turn, double target creature's power X times.
{4}{B}
Exquisite Blood
Enchantment
Whenever an opponent loses life, you gain that much life.
{3}{B}
Falkenrath Noble
Creature - Vampire Noble
Flying
Whenever Falkenrath Noble or another creature dies, target player loses 1 life and you gain 1 life.
2 /
2
{3}{B}
Gixian Puppeteer
Creature - Phyrexian Warlock
Whenever you draw your second card each turn, each opponent loses 2 life and you gain 2 life.
When Gixian Puppeteer dies, return another target creature card with mana value 3 or less from your graveyard to the battlefield.
4 /
3
{1}{B}
Hunt for Specimens
Sorcery
Create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life."
Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)
{B}{G}
Infuse with Vitality
Instant
Until end of turn, target creature gains deathtouch and "When this creature dies, return it to the battlefield tapped under its owner's control."
You gain 2 life.
{2}{B}{R}{G}
Korvold, Fae-Cursed King
Legendary Creature - Dragon Noble
Flying
Whenever Korvold, Fae-Cursed King enters the battlefield or attacks, sacrifice another permanent.
Whenever you sacrifice a permanent, put a +1/+1 counter on Korvold and draw a card.
4 /
4
{3}{B}
Mage Hunter
Creature - Horror
Whenever an opponent casts or copies an instant or sorcery spell, they lose 1 life.
3 /
4
{1}{B}{R}
Mayhem Devil
Creature - Devil
Whenever a player sacrifices a permanent, Mayhem Devil deals 1 damage to any target.
3 /
3
{2}{B}{G}
Mortality Spear
Instant
This spell costs {2} less to cast if you gained life this turn.
Destroy target nonland permanent.
{X}{X}{G}
Pest Infestation
Sorcery
Destroy up to X target artifacts and/or enchantments. Create twice X 1/1 black and green Pest creature tokens with "When this creature dies, you gain 1 life."
{1}{B}
Plumb the Forbidden
Instant
As an additional cost to cast this spell, you may sacrifice one or more creatures. When you do, copy this spell for each creature sacrificed this way.
You draw a card and you lose 1 life.
{4}{B}
Revel in Riches
Enchantment
Whenever a creature an opponent controls dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
At the beginning of your upkeep, if you control ten or more Treasures, you win the game.
{B}{G}
Rushed Rebirth
Instant
Choose target creature. When that creature dies this turn, search your library for a creature card with lesser mana value, put it onto the battlefield tapped, then shuffle.
{3}{B}{B}
Sanguine Bond
Enchantment
Whenever you gain life, target opponent loses that much life.
{2}{G}
Scute Swarm
Creature - Insect
Landfall -- Whenever a land enters the battlefield under your control, create a 1/1 green Insect creature token. If you control six or more lands, create a token that's a copy of Scute Swarm instead.
1 /
1
{4}{B}{B}
Sengir, the Dark Baron
Legendary Creature - Vampire Noble
Flying
Whenever another creature dies, put two +1/+1 counters on Sengir, the Dark Baron.
Whenever another player loses the game, you gain life equal to that player's life total as the turn began.
Partner (You can have two commanders if both have partner.)
4 /
4
{G}
Snakeskin Veil
Instant
Put a +1/+1 counter on target creature you control. It gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)
{B}{G}
Tend the Pests
Instant
As an additional cost to cast this spell, sacrifice a creature.
Create X 1/1 black and green Pest creature tokens with "When this creature dies, you gain 1 life," where X is the sacrificed creature's power.
{B}{G}
Treasured Find
Sorcery
Return target card from your graveyard to your hand. Exile Treasured Find.
{B}{B}{B}
Underworld Dreams
Enchantment
Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.
{2}{B}
Vito, Thorn of the Dusk Rose
Legendary Creature - Vampire Cleric
Whenever you gain life, target opponent loses that much life.
{3}{B}{B}: Creatures you control gain lifelink until end of turn.
1 /
3
{B}{G}
Witherbloom Apprentice
Creature - Human Druid
Magecraft -- Whenever you cast or copy an instant or sorcery spell, each opponent loses 1 life and you gain 1 life.
2 /
2
{3}{B/G}{B/G}
Witherbloom Pledgemage
Creature - Treefolk Warlock
Magecraft -- Whenever you cast or copy an instant or sorcery spell, you gain 1 life.
5 /
5
{2}{R}
Witty Roastmaster
Creature - Devil Citizen
Alliance -- Whenever another creature enters the battlefield under your control, Witty Roastmaster deals 1 damage to each opponent.
3 /
2
{1}{G}{G}
Basic Conjuration
Sorcery - Lesson
Look at the top six cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. You gain 3 life.
{2}{G}
Containment Breach
Sorcery - Lesson
Destroy target artifact or enchantment. If its mana value is 2 or less, create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life."
{2}
Environmental Sciences
Sorcery - Lesson
Search your library for a basic land card, reveal it, put it into your hand, then shuffle. You gain 2 life.
{1}{B/G}{B/G}
Pest Summoning
Sorcery - Lesson
Create two 1/1 black and green Pest creature tokens with "When this creature dies, you gain 1 life."