Echoing Decay

Target creature and all other creatures with the same name as that creature get -2/-2 until end of turn.

Bone Shards

As an additional cost to cast this spell, sacrifice a creature or discard a card.
Destroy target creature or planeswalker.

Infernal Grasp

Destroy target creature. You lose 2 life.

Necromancer's Stockpile

{1}{B}, Discard a creature card: Draw a card. If the discarded card was a Zombie card, create a tapped 2/2 black Zombie creature token.

Headless Rider

Whenever this creature or another nontoken Zombie you control dies, create a 2/2 black Zombie creature token.

Macabre Waltz

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

Swamp

Miasmic Mummy

When this creature enters, each player discards a card.

Scourge of Nel Toth

Flying
You may cast this creature from your graveyard by paying {B}{B} and sacrificing two creatures rather than paying its mana cost.

Fleshbag Marauder

When this creature enters, each player sacrifices a creature of their choice.

Gravecrawler

This creature can't block.
You may cast this card from your graveyard as long as you control a Zombie.

Cryptbreaker

{1}{B}, {T}, Discard a card: Create a 2/2 black Zombie creature token.
Tap three untapped Zombies you control: You draw a card and you lose 1 life.

Stitcher's Supplier

When this creature enters or dies, mill three cards. (Put the top three cards of your library into your graveyard.)

Putrid Imp

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