Trample

Mark of Chaos Ascendant -- During your turn, spells you cast from your hand with mana value X or less have cascade, where X is the total amount of life your opponents have lost this turn.

Byzantium Radiation -- At the beginning of your upkeep, put an exposure counter on Aplan Mortarium. Then you lose life equal to the number of exposure counters on it.

Whenever chaos ensues, create two 2/2 black Alien Angel artifact creature tokens with first strike, vigilance, and "Whenever an opponent casts a creature spell, this permanent isn't a creature until end of turn."

Flying

At the beginning of each opponent's end step, that player chooses up to two creatures they control, then sacrifices the rest.

Flying

Whenever a source an opponent controls deals damage to Archfiend of Spite, that source's controller loses that much life unless they sacrifice that many permanents.

Madness {3}{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.)

Menace

Ruinous Ascension -- When Aspiring Champion deals combat damage to a player, sacrifice it. If you do, reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield, then shuffle the rest into your library. If that creature is a Demon, it deals damage equal to its power to each opponent.

Flying

Prince of Chaos -- When Be'lakor, the Dark Master enters the battlefield, you draw X cards and you lose X life, where X is the number of Demons you control.

Lord of Torment -- Whenever another Demon enters the battlefield under your control, it deals damage equal to its power to any target.

At the beginning of your upkeep, you may sacrifice Blood Speaker. If you do, search your library for a Demon card, reveal that card, put it into your hand, then shuffle.

Whenever a Demon enters the battlefield under your control, return Blood Speaker from your graveyard to your hand.

Trample

Devastating Charge -- Other creatures you control have trample.

{T}, Pay 2 life, Discard a card, Sacrifice a creature: Create a 5/5 black Demon creature token with flying. Activate only as a sorcery.

Flying, trample

Whenever Bloodthirster deals combat damage to a player, untap it. After this combat phase, there is an additional combat phase.

Bloodthirster can't attack a player it has already attacked this turn.

Trample

Battle Cannon -- When Chaos Defiler enters the battlefield or dies, for each opponent, choose a nonland permanent that player controls. Destroy one of them chosen at random.

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

Flying, trample

Flying, trample

Whenever Demon of Loathing deals combat damage to a player, that player sacrifices a creature.

Flying

Lieutenant -- As long as you control your commander, Demon of Wailing Agonies gets +2/+2 and has "Whenever Demon of Wailing Agonies deals combat damage to a player, that player sacrifices a creature."

Whenever a player casts a black spell, you may gain 1 life.

Exile the top thirteen cards of your library, then search your library for a card. Put that card into your hand, then shuffle.

Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield under its owner's control."

At the beginning of your upkeep, choose one that hasn't been chosen --

• Demonic Pact deals 4 damage to any target and you gain 4 life.

• Target opponent discards two cards.

• Draw two cards.

• You lose the game.

Enchant creature

Enchanted creature gets +1/+1.

When enchanted creature dies, return that card to its owner's hand.

Whenever you lose life for the first time each turn, you get {E}. (You get an energy counter. Damage causes loss of life.)

Pay {E}{E}, Sacrifice Gonti's Machinations: Each opponent loses 3 life. You gain life equal to the life lost this way.

Reverberating Summons -- At the beginning of your end step, each opponent loses 2 life. Then for each opponent who has less life than you, create a 1/3 black Demon creature token named Plaguebearer of Nurgle.

Locus of Slaanesh -- Demon spells you cast cost {2} less to cast.

Other Demons you control have haste.

Flying

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

You may reveal the first card you draw each turn as you draw it. Whenever you reveal an instant or sorcery card this way, create Cherubael, a legendary 4/4 black Demon creature token with flying.

Whenever Inquisitor Eisenhorn deals combat damage to a player, investigate that many times. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

When Kardur, Doomscourge enters the battlefield, until your next turn, creatures your opponents control attack each combat if able and attack a player other than you if able.

Whenever an attacking creature dies, each opponent loses 1 life and you gain 1 life.

If you would lose the game, instead shuffle your hand, your graveyard, and all permanents you own into your library, then draw seven cards and your life total becomes 20.

When Lord Xander, the Collector enters the battlefield, target opponent discards half the cards in their hand, rounded down.

Whenever Lord Xander attacks, defending player mills half their library, rounded down.

When Lord Xander dies, target opponent sacrifices half the nonland permanents they control, rounded down.

Flying, ward {3}

Architect of Deception -- When Lord of Change enters the battlefield, draw three cards.

Flying

Unearthly Power -- Instant and sorcery spells you cast cost {1} less to cast for each creature token you control.

Blade of Magnus -- Whenever Magnus the Red deals combat damage to a player, create a 3/3 red Spawn creature token.

{T}, Sacrifice another creature: Add {B}{B}{B}. Spend this mana only to cast Vampire, Cleric, and/or Demon spells.

Flying

Primarch of the Death Guard -- At the beginning of your end step, you may pay {X}. If you do, create X 2/2 black Astartes Warrior creature tokens with menace. X can't be greater than the amount of life you lost this turn.

Enchant creature an opponent controls

When enchanted creature dies, return Nurgle's Rot to its owner's hand and you create a 1/3 black Demon creature token named Plaguebearer of Nurgle.

Flying, trample

When Orcus, Prince of Undeath enters the battlefield, choose one --

• Each other creature gets -X/-X until end of turn. You lose X life.

• Return up to X target creature cards with total mana value X or less from your graveyard to the battlefield. They gain haste until end of turn.

Flying

Rot Fly -- If an opponent would gain life, that player loses that much life instead.

Flying, trample

When Rakdos, the Showstopper enters the battlefield, flip a coin for each creature that isn't a Demon, Devil, or Imp. Destroy each creature whose coin comes up tails.

(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."

Haste

Allure of Slaanesh -- Each opponent must attack with at least one creature each combat if able.

Jolly Gutpipes -- {2}, {T}, Sacrifice a creature: The next creature spell you cast this turn has cascade. (When you cast your next creature spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

Flying

As Sower of Discord enters the battlefield, choose two players.

Whenever damage is dealt to one of the chosen players, the other chosen player also loses that much life.

The next time you would lose the game this turn, instead draw seven cards and your life total becomes 1.

Exile Stunning Reversal.

This spell costs {1} less to cast for each permanent sacrificed this turn.

Haste

The Balrog, Durin's Bane can't be blocked except by legendary creatures.

When The Balrog dies, destroy target artifact or creature an opponent controls.

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

I -- Create a 2/3 red Demon Berserker creature token with menace.

II -- Whenever a Berserker attacks this turn, you draw a card and you lose 1 life.

III -- Add {R} for each Berserker you control. Until end of turn, you don't lose this mana as steps and phases end.

Arcane Life-support -- If you would lose the game, instead exile The Golden Throne and your life total becomes 1.

A Thousand Souls Die Every Day -- {T}, Sacrifice a creature: Add three mana in any combination of colors.

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

I -- For each opponent, gain control of up to one target nonlegendary creature that player controls for as long as The Horus Heresy remains on the battlefield.

II -- Draw a card for each creature you control but don't own.

III -- Starting with you, each player chooses a creature. Destroy each creature chosen this way.

Deathtouch

Boast -- {1}{B}: Target player searches their library for a card, then shuffles and puts that card on top. (Activate only if this creature attacked this turn and only once each turn.)

Lifelink

Devourer of Souls -- Whenever another creature dies, put a +1/+1 counter on Venomcrawler.

Flying

{B}, Pay 2 life: Target creature gets -1/-1 until end of turn.

Whenever you lose life, draw that many cards. (Damage causes loss of 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