Crippling Blight

Enchant creature
Enchanted creature gets -1/-1 and can't block.

Macabre Waltz

Return up to two target creature cards from your graveyard to your hand, then discard a card.

March of the Returned

Return up to two target creature cards from your graveyard to your hand.

Pharika's Cure

Pharika's Cure deals 2 damage to target creature and you gain 2 life.

Plague Mare

Plague Mare can't be blocked by white creatures.
When Plague Mare enters, creatures your opponents control get -1/-1 until end of turn.

Shadow Slice

Target opponent loses 3 life.
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.)

Sorin's Thirst

Sorin's Thirst deals 2 damage to target creature and you gain 2 life.

Shrivel

All creatures get -1/-1 until end of turn.

Divest

Target player reveals their hand. You choose an artifact or creature card from it. That player discards that card.

Yahenni, Undying Partisan

Haste
Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni, Undying Partisan.
Sacrifice another creature: Yahenni gains indestructible until end of turn.