Whenever Merchant of Flesh or another creature you control dies, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”) {B}, Sacrifice two Treasures: Each opponent sacrifices a creature.
Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life. {2}{B}: Create a 1/1 black Rat creature token with “This creature can't block.” Activate only if there are five or more creature cards in your graveyard.
Enchant opponent Whenever Middleware or another Curse becomes attached to enchanted player, exile the top card of that player's library face down. For as long as that card remains exiled, you may look at it and you may play it. Mana of any type can be spent to cast that spell.
Harvest (You may tap any number of creatures you control as you cast this spell. If you do, reduce this spell's mana cost by their total power.) Destroy target creature.
Thomas was quick to boast during the day and quicker to run off scared during the night.
Whenever you cast a spell from exile, put two +1/+1 counters on Midnight Vagrant. It gains menace until end of turn. {1}{B}{B}: Exile the top card of target opponent's library. You may play that card during any turn you attacked with a Rogue, and you may spend mana as though it were mana of any color to cast it. Activate only as a sorcery.
Flying Mind's Contagion has haste as long as there are two or more creature cards in your graveyard. Whenever Mind's Contagion deals combat damage to a player, until your next turn, it gains “Noncreature spells opponents cast cost an additional 2 life to cast.”
Lifelink Mind-Pryer gets +1/+1 as long as an opponent has one or fewer cards in hand. Whenever an opponent discards a card, Mind-Pryer cackles. (Put a menace counter on it. If it already has menace, it deals 1 damage to each opponent instead.)
Whenever Ming Fleet Privateer attacks, put a menace counter on target creature in its pack. (Two or more creatures you control with equal power are in a pack.)
“Fewer are the unclaimed treasures of this world than the pockets of my hanfu.”” —Quan Li, Dusk Operative
Menace When Minotaur Skullsmasher enters, choose a nonland card type. Then target opponent reveals their hand. You choose a card of the chosen type from it. That player discards that card.
When Miserable Portent enters, create a 1/1 black Harpy creature token with flying. {3}{B}, Sacrifice Miserable Portent: You draw two cards and you lose 2 life.
Create a 1/1 blue Illusion creature token with “This gets +1/+1 for each other Illusion you control.” Coalesce {6}{B}(You may cast this from your graveyard for {6}{B}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.) Misery Keeps Company is an Illusion in addition to its other types while it's a creature.