Exile target creature or planeswalker. Its controller loses 2 life.

You draw two cards, lose 2 life, and mill two cards.

When Phenax's Touch enters, each opponent discards a card and loses 1 life.
{1}{B}, Sacrifice Phenax's Touch: You draw a card and you lose 1 life.

Each player mills two cards. When you do, return target creature card from your graveyard to your hand.

Enchant creature
Enchanted creature has “At the beginning of your upkeep, sacrifice a creature. If you can't, you lose 3 life.”

Poisoned Strike deals 3 damage to target creature. That creature's controller mills three cards.

Until end of turn, target creature gains “When this creature dies, return it to the battlefield tapped under its owner's control and teach it flying.”

Enchant creature
Enchanted creature gets +1/+1 and can't block.
Wander {1}{B}

Enchant creature
Enchanted creature gets -X/-X, where X is your devotion to black.

Whenever this Subroutine runs, surveil 2.
{1}{B}, Pay 2 life, Sacrifice this Subroutine: Draw two cards.

Each player sacrifices a creature.
As long as a creature card or creature token was put into your graveyard from anywhere this turn, Rank and Defile has flashback {2}{B}.

Surveil 2. When you do, return up to one target creature card from your graveyard to the battlefield.

Return target artifact or creature card from your graveyard to the battlefield.
Flashback—{3}{B}, Sacrifice a creature.

Return any number of creature cards with total mana value less than or equal to twice your devotion to black from your graveyard to the battlefield.

Approval — This spell costs {X} less to cast, where X is the number of colors among permanents you control.
Exile target creature.

Target creature you control gains deathtouch until end of turn. When that creature dies this turn, create a 2/2 black Zombie creature token.

Choose one —
• Each opponent sacrifices a creature that's one or fewer colors.
• Each opponent sacrifices a creature that's two or more colors.

Put target creature card from a graveyard onto the battlefield under your control.
Cycling {1}{B}
When you cycle this card, target player mills three cards.

Whenever you attack, defending player loses 2 life and you gain 2 life.

Enchant creature
Enchanted creature gets -1/-1.
Sacrifice an artifact: Destroy enchanted creature. Activate only as a sorcery.

{B}, Sacrifice Serrated Fossil: Choose a nonland card name. Target player reveals their hand and discards a card with that name if able. Activate only as a sorcery.
Surface {3}{B}{B}. Serrated Fossil surfaces transformed.

Whenever a nontoken creature you control dies, create a token that's a copy of it, except it's a Minion and has decayed.

When Shadow Sky enters and whenever you cast a spell, each creature target player controls gets -1/-1 until end of turn.

{4}{B}: You draw a card and you lose 1 life. This ability costs {1} less to activate for each other Shrine you control. Activate only once each turn.

Landfall — Whenever a land you control enters, you gain 2 life and put a soot counter on Sifting Through Soot.
{B}, Remove two soot counters from Sifting Through Soot: Target player loses 2 life.
{3}{B}, Remove five soot counters from Sifting Through Soot and sacrifice it: Return target artifact or creature card from your graveyard to the battlefield. Activate only as a sorcery.