Flash
When Hazard Blade enters, destroy target creature an opponent controls that was dealt damage this turn.
Equipped creature get +4/+0.
Equip {5}

Target player reveals their hand. You choose a nonland card from it. Exile that card. Each player draws a card and loses 1 life.

Target player sacrifices a creature. When they do, pay for and choose any number.
+{B} — Each player discards a card.
+{W} — Exile target player's graveyard. You gain 1 life for each nonland card exiled this way.
+{C} — Cast a copy of a card you don't own in exile with mana value 3 or less without paying its mana cost.

Destroy target creature or enchantment you don't control. If your devotion to black is three or greater, you gain 3 life.

Exile target creature. Create a token that's a copy of it except it's a Ruin artifact instead of its other types and it has spellcharge X, where X is its mana value.

When Kakomanties Circle enters, create a 2/2 black Zombie creature token.
Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.

Destroy target monocolored creature. Make a pledge.

Target creature gets +2/+0 and gains indestructible and lifelink until end of turn.

At the beginning of your end step, each player mills two cards. Then if it's your first turn of the game or you discarded a card named Leystone of Ruin this turn, target player mills four cards.
Cycling {B}

Integrate the top two cards of target player's library. They lose 2 life, and you gain 2 life.
Whenever a permanent you control with two or more cards integrated onto it dies, you may pay {B}. If you do, return Lure into Lunacy from your graveyard to your hand.

Draw two cards. If you don't control an artifact creature, you lose 3 life.

Destroy target creature or planeswalker if it has mana value 3 or less or if you control a legendary creature.

Exile the top X cards of target opponent's library. You may play those cards for as long as they remain exiled, and you may pay {VP}{VP}{B} rather than pay the mana costs of those spells.

Each opponent separates the creatures they control into two piles. For each opponent, you choose one of their piles. Each opponent sacrifices the creatures in their chosen pile.

You lose life equal to the number of cards you've drawn this turn, then draw a card. You may repeat this process any number of times.

Target opponent reveals their hand. You choose a nonland card from it with mana value 4 or less. If you do, exile that card. Otherwise, draw a card.

Enchant creature
Enchanted creature gets +2/+1.
{2}{B}, Discard a card: Enchanted creature gains indestructible until end of turn. Tap it.

All creatures get -2/-2 until end of turn. Until end of turn, whenever one of those creatures die, create a tapped Treasure token.

You may cast this spell as though it had flash as long as your devotion to black is three or greater.
Scry 2, then draw two cards. You lose 2 life.

Destroy target creature if it has fewer colors than the number of colors of mana spent to cast this spell.

Flash
When Omen of Slaughter enters, each opponent sacrifices a creature or planeswalker.
{2}{B}, Sacrifice Omen of Slaughter: Scry 2.

Your maximum hand size is zero.
Pay 1 life: Draw a card. Activate only as a sorcery.

Enchant creature
Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Pharika.
Whenever you sacrifice Ordeal of Pharika, creatures your opponents control get -2/-2 until end of turn.

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

Mill three cards, then you may return a creature card from your graveyard to the battlefield with a menace counter on it.