Disease Carriers

When Disease Carriers dies, target creature gets -2/-2 until end of turn.

Plague Dogs

When Plague Dogs dies, all creatures get -1/-1 until end of turn.
, Sacrifice Plague Dogs: Draw a card.

Festering Wound

Enchant creature
At the beginning of your upkeep, you may put an infection counter on Festering Wound.
At the beginning of the upkeep of enchanted creature’s controller, Festering Wound deals X damage to that player, where X is the number of infection counters on Festering Wound.

Rapid Decay

Exile up to three target cards from a single graveyard.
Cycling (, Discard this card: Draw a card.)

Ostracize

Target opponent reveals their hand. You choose a creature card from it. That player discards that card.

Grim Monolith

Grim Monolith doesn’t untap during your untap step.
: Add .
: Untap Grim Monolith.

Order of Yawgmoth

Fear (This creature can’t be blocked except by artifact creatures and/or black creatures.)
Whenever Order of Yawgmoth deals damage to a player, that player discards a card.

Grollub

Whenever Grollub is dealt damage, each opponent gains that much life.

Tainted Specter

Flying
, : Target player discards a card unless they put a card from their hand on top of their library. If that player discards a card this way, Tainted Specter deals 1 damage to each creature and each player. Activate this ability only any time you could cast a sorcery.

Cycle of Life

Return Cycle of Life to its owner’s hand: Target creature you cast this turn has base power and toughness 0/1 until your next upkeep. At the beginning of your next upkeep, put a +1/+1 counter on that creature.

Haunting Apparition

Flying
As Haunting Apparition enters the battlefield, choose an opponent.
Haunting Apparition’s power is equal to 1 plus the number of green creature cards in the chosen player’s graveyard.