Reap the Seagraf

Create a 2/2 black Zombie creature token.
Flashback {4}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Negate

Stitched Drake

As an additional cost to cast this spell, exile a creature card from your graveyard.
Flying

Ghoulraiser

When this creature enters, return a Zombie card at random from your graveyard to your hand.

Rotting Fensnake

Headless Skaab

As an additional cost to cast this spell, exile a creature card from your graveyard.
This creature enters tapped.

Farbog Boneflinger

When this creature enters, target creature gets -2/-2 until end of turn.

Screeching Skaab

When this creature enters, mill two cards.

Diregraf Captain

Deathtouch
Other Zombie creatures you control get +1/+1.
Whenever another Zombie you control dies, target opponent loses 1 life.

Moan of the Unhallowed

Create two 2/2 black Zombie creature tokens.
Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Abattoir Ghoul

First strike
Whenever a creature dealt damage by this creature this turn dies, you gain life equal to that creature's toughness.

Skaab Goliath

As an additional cost to cast this spell, exile two creature cards from your graveyard.
Trample

Zombie Infestation

Discard two cards: Create a 2/2 black Zombie creature token.

Swamp

Zombie Goliath

Forbidden Alchemy

Look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard.
Flashback {6}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Dead Weight

Enchant creature
Enchanted creature gets -2/-2.

Island

Black Cat

When this creature dies, target opponent discards a card at random.

Havengul Runebinder

{2}{U}, {T}, Exile a creature card from your graveyard: Create a 2/2 black Zombie creature token, then put a +1/+1 counter on each Zombie creature you control.

Endless Ranks of the Dead

At the beginning of your upkeep, create X 2/2 black Zombie creature tokens, where X is half the number of Zombies you control, rounded down.

Evolving Wilds

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Cellar Door

{3}, {T}: Target player puts the bottom card of their library into their graveyard. If it's a creature card, you create a 2/2 black Zombie creature token.

Makeshift Mauler

As an additional cost to cast this spell, exile a creature card from your graveyard.

Walking Corpse

Corpse Lunge

As an additional cost to cast this spell, exile a creature card from your graveyard.
Corpse Lunge deals damage equal to the exiled card's power to target creature.