Lose Hope

Target creature gets -1/-1 until end of turn. Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Putrid Imp

Discard a card: Putrid Imp gains flying until end of turn.
Threshold — As long as seven or more cards are in your graveyard, Putrid Imp gets +1/+1 and can't block.

Severed Legion

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Liliana's Elite

Liliana's Elite gets +1/+1 for each creature card in your graveyard.

Scathe Zombies

Sickening Dreams

As an additional cost to cast this spell, discard X cards.
Sickening Dreams deals X damage to each creature and each player.

Blind Creeper

Whenever a player casts a spell, Blind Creeper gets -1/-1 until end of turn.

Maggot Carrier

When Maggot Carrier enters, each player loses 1 life.

Swamp

Carrion Feeder

Carrion Feeder can't block.
Sacrifice a creature: Put a +1/+1 counter on Carrion Feeder.

Gravedigger

When Gravedigger enters, you may return target creature card from your graveyard to your hand.