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.”

Target player discards two cards. If all the cards discarded this way share a card type, that player loses 3 life.

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

Destroy target creature an opponent controls. Each other creature that player controls gets -2/-0 until end of turn.

Target creature gets +1/+1 and gains deathtouch until end of turn. Scry 1.

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

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}.

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.

Scry 2, then draw two cards. You lose 2 life.

Enchant creature
Enchanted creature gets -1/-1.
Sacrifice an artifact: Destroy enchanted creature.

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

{2}{B}: Return target creature card with mana value X or less from your graveyard to the battlefield, where X is the number of Shrines you control. Activate only once each turn and only during your turn.

Equipped creature gets +3/+0 and has menace.
Whenever a creature you control enters, if it wasn't cast, you may attach Skeleton Keytar to it.
Equip {5}

Return up to three target cards from your graveyard to your hand. Exile Soulless Archive.

Choose one or both —
• Return target creature card from your graveyard to your hand.
• Return target creature card in your graveyard that was put there from the battlefield this turn to your hand.

Target creature gets -3/-3 until end of turn. If that creature would die this turn, exile it instead.

Enchant player
At the beginning of each end step, enchanted player gains life equal to the amount of life they've gained this turn, then loses life equal to the amount of life they've lost this turn.

Each opponent discards two cards, then mills two cards.
Each opponent loses 2 life and you gain 2 life.
For each opponent that has eight or more cards in their graveyard, exile a card from that player's graveyard. You may cast cards exiled this way this turn, and mana of any type can be spent to cast cast it.