msem-instigator

Each opponent sacrifices a creature, then loses 4 life. You return a creature card from your graveyard to your hand, then gain 4 life.

Engage (This creature must be blocked each combat if able.)
Whenever Death Pits Gladiator perseveres, profit. (A creature perseveres when it survives damage. To profit, create a colorless Gold artifact token with “Sacrifice this artifact: Add one mana of any color.”)

Haste
Whenever another creature you control dies, each opponent loses 1 life and you gain 1 life.

When Death Pits Trophy enters, target opponent discards a card.
Equipped creature gets +1/+1.
Equip {1}

Return target creature card from your graveyard to the battlefield. If it's your combat phase, that creature enters tapped and attacking.

Destroy target creature that's not enchanted and isn't an enchantment.

Destroy four target creatures.

Return target creature card from your graveyard to the battlefield. If this spell was cast from a graveyard, you lose life equal to that creature's mana value.
Flashback {1}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Enchant land
When Death in Bloom enters, mill four cards, then return a permanent card from your graveyard to your hand.
Enchanted land has “{T}: Add two mana of any one color.”

Put target permanent on top of its owner's library.

Each creature can't have power greater than its base power and can't have toughness greater than its base toughness.

Choose a nonlegendary, nonland card name. Target opponent reveals their hand and discards a card with that name.
Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)

Choose target creature card in your graveyard that was put there from the battlefield this turn. Return that card to the battlefield tapped.
Fabled {3}{B}{B} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

When Death's Sentry enters, if a creature died this turn, create a 2/2 black Zombie creature token.

You can't cast this spell as long as your life total is greater than half your starting life total.
Lifelink
{1}{B}{G}, Discard Death's Widow: Destroy target nonland permanent. You lose life equal to its mana value.

Deathtouch
When Deathbed Confessor enters, if it entered from a graveyard or you cast it from a graveyard, you draw two cards and you lose 2 life.

Deathtouch
{3}{G}: Deathcoil Cobra gains indestructible until end of turn.

Whenever another creature you control dies, put a +1/+1 counter on Deathfeeder.
Sacrifice Deathfeeder: Target creature gets +X/+X until end of turn, where X is Deathfeeder's power.

Flying, deathtouch

Menace, haste
Invocation — Whenever you spend four or more mana to cast a spell or activate an ability during your turn, return Deathless Butcher from your graveyard to your hand.

Enchant creature
When Deathless Conscription enters, untap enchanted creature.
You control enchanted creature.

When Deathless Disciple dies, if it's not a token, create a token that's a copy of it, except it has no mana cost.
Revive {6}{B} ({6}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Flying
Other Spirits you control get +1/+1.
Whenever a Spirit you control attacks, you gain 1 life.

When Deathless Hunter dies, you may put it on the bottom of its owner's library.

You don't lose the game for having 0 or less life.
Whenever you're dealt damage, mill that many cards.
{B}, Pay 2 life: Put target card in your graveyard on the bottom of your library.