Skinrender

When Skinrender enters, put three -1/-1 counters on target creature.

Sign in Blood

Target player draws two cards and loses 2 life.

Skeletons you control and other Zombies you control get +1/+1 and have deathtouch.

Gravecrawler can't block.
You may cast Gravecrawler from your graveyard as long as you control a Zombie.

Changeling (This card is every creature type.)
Target creature gets +3/-3 and loses all creature types until end of turn.

You may play an additional land this turn.
Draw a card.

Pay 2 life: Putrid Leech gets +2/+2 until end of turn. Activate only once each turn.

Other Zombie creatures get +1/+1.
{1}{B}, {T}: Return target Zombie card from your graveyard to your hand.

Other Zombie creatures you control get +1/+1.
{2}{B}, {T}: Exile target creature card from a graveyard. Create a 2/2 black Zombie creature token.

Zombie spells you cast cost {1} less to cast.
Zombie creatures you control get +2/+1.