Diregraf Ghoul

Death Baron

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

Relentless Dead

Menace (This creature can't be blocked except by two or more creatures.)
When Relentless Dead dies, you may pay {B}. If you do, return it to its owner's hand.
When Relentless Dead dies, you may pay {X}. If you do, return another target Zombie creature card with mana value X from your graveyard to the battlefield.

Shambling Ghoul

Rotting Regisaur

At the beginning of your upkeep, discard a card.

Stitcher's Supplier

When Stitcher's Supplier enters or dies, mill three cards. (Put the top three cards of your library into your graveyard.)