Thrull Parasite

Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)
, Pay 2 life: Remove a counter from target nonland permanent.

Whispering Madness

Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.
Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Annihilating Fire

Annihilating Fire deals 3 damage to any target. If a creature dealt damage this way would die this turn, exile it instead.

Syncopate

Counter target spell unless its controller pays . If that spell is countered this way, exile it instead of putting it into its owner’s graveyard.

Destroy the Evidence

Destroy target land. Its controller reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard.

Putrefy

Destroy target artifact or creature. It can’t be regenerated.

Rite of Ruin

Choose an order for artifacts, creatures, and lands. Each player sacrifices one permanent of the first type, sacrifices two of the second type, then sacrifices three of the third type.

Righteous Blow

Righteous Blow deals 2 damage to target attacking or blocking creature.

Screeching Skaab

When Screeching Skaab enters the battlefield, mill two cards.

Bone to Ash

Counter target creature spell.
Draw a card.

Geist-Honored Monk

Vigilance
Geist-Honored Monk’s power and toughness are each equal to the number of creatures you control.
When Geist-Honored Monk enters the battlefield, create two 1/1 white Spirit creature tokens with flying.

Sever the Bloodline

Exile target creature and all other creatures with the same name as that creature.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Vampire Outcasts

Bloodthirst 2 (If an opponent was dealt damage this turn, this creature enters the battlefield with two +1/+1 counters on it.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Shared Trauma

Join forces — Starting with you, each player may pay any amount of mana. Each player mills X cards, where X is the total amount of mana paid this way.