Other Zombies you control get +1/+0.

Skeletons you control and other Zombies you control get +1/+1 and have deathtouch. (Any amount of damage they deal to a creature is enough to destroy it.)

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

This creature enters with a +1/+1 counter on it for each Zombie card in your graveyard. Whenever you cast a Zombie spell, create a tapped 2/2 black Zombie creature token.

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.

Whenever this creature or another Zombie enters, all non-Zombie creatures get -1/-1 until end of turn.

You draw two cards and you lose 2 life.

When this creature enters, target player mills five cards. Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Zombies you control have flying. {U}, {T}, Sacrifice another nontoken creature: Create an X/X blue Zombie creature token, where X is the sacrificed creature's toughness.

{3}, {T}, Sacrifice another Zombie: Create two tokens that are copies of the sacrificed creature.

Whenever a nontoken Zombie you control enters, create a token that's a copy of that creature.