This add-on has a special zombies they can summon zombies, poison effect to their target, shooting fireballs, teleport, etc. This zombie can spawn naturally and other cannot spawn naturally but you can spawn through the spawn egg and you need to prepare.
This zombies is special so make sure you need to prepare
This is a zombies below:
Wear: Netherite armor
King Of The Zombie
Command: /summon zm:zombie_king
This Zombie can summon Zombies and they have a wither effecf to their target.
God of the Zombie
Shoot: Large Fireball
Summon: Elite Zombies
Command: /summon zombie_god