Mutual Destruction

This spell has flash as long as you control a permanent with flash.
As an additional cost to cast this spell, sacrifice a creature.
Destroy target creature.

Legion Conquistador

When Legion Conquistador enters the battlefield, you may search your library for any number of cards named Legion Conquistador, reveal them, put them into your hand, then shuffle.

Battalion Foot Soldier

When Battalion Foot Soldier enters the battlefield, you may search your library for any number of cards named Battalion Foot Soldier, reveal them, put them into your hand, then shuffle.

Cabal Therapy

Choose a nonland card name. Target player reveals their hand and discards all cards with that name.
Flashback—Sacrifice a creature. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Gathering Throng

When Gathering Throng enters the battlefield, you may search your library for any number of cards named Gathering Throng, reveal them, put them into your hand, then shuffle.

Cabal Therapist

Menace
At the beginning of your precombat main phase, you may sacrifice a creature. When you do, choose a nonland card name, then target player reveals their hand and discards all cards with that name.

Grave Peril

When a nonblack creature enters the battlefield, sacrifice Grave Peril. If you do, destroy that creature.

Desperate Research

Choose a card name other than a basic land card name. Reveal the top seven cards of your library and put all of them with that name into your hand. Exile the rest.

Liar's Pendulum

{2}, {T}: Choose a card name. Target opponent guesses whether a card with that name is in your hand. You may reveal your hand. If you do and your opponent guessed wrong, draw a card.

Orzhov Guildgate

Orzhov Guildgate enters the battlefield tapped.
{T}: Add {W} or {B}.

Bone Splinters

As an additional cost to cast this spell, sacrifice a creature.
Destroy target creature.