Other Zombies you control get +1/+0.

Whenever another Zombie enters the battlefield under your control, put a +1/+1 counter on Champion of the Perished.

Skeletons, Vampires, and Zombies you control get +1/+1. At the beginning of your end step, if a creature died this turn, you may pay {1}. If you do, create a 1/1 black Skeleton creature token.

When Diregraf Horde enters the battlefield, create two 2/2 black Zombie creature tokens with decayed. When you do, exile up to two target cards from graveyards. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)

Flying When Falcon Abomination enters the battlefield, create a 2/2 black Zombie creature token with decayed. (It can't block. When it attacks, sacrifice it at end of combat.)

Whenever Headless Rider or another nontoken Zombie you control dies, create a 2/2 black Zombie creature token.

Flash Flying Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Overcharged Amalgam exploits a creature, counter target spell, activated ability, or triggered ability.

Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Rot-Tide Gargantua exploits a creature, each opponent sacrifices a creature.

Destroy target creature or planeswalker.