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

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

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

Diregraf Colossus enters the battlefield 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.

When Gleaming Overseer enters the battlefield, amass Zombies 1. (Put a +1/+1 counter on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.) Zombie tokens you control have hexproof and menace.

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

Other Zombies you control get +1/+1. {1}{B}, {T}: All Zombies gain menace until end of turn.

Whenever Undead Augur or another Zombie you control dies, you draw a card and you lose 1 life.

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

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 a nontoken Zombie enters the battlefield under your control, create a token that's a copy of that creature.

{2}, {T}: Add {B} for each Swamp you control.