Addon: Mo' Zombies 3.5.8
Author: Zorrocraft1
Mo' Zombies expands nightly survival with fourteen stronger zombie types. The new enemies move and attack differently from ordinary undead, making mixed groups considerably more dangerous.

Lava Zombies set their surroundings on fire, Toxic Zombies poison targets and Armored Zombies absorb much more damage. Additional variants and bosses turn caves, ruins and nighttime travel into prolonged fights rather than routine encounters.
Version 3.5.8 gives Zombies and Husks more disturbing glowing eyes, blood and decayed skin. Boss movement and attack animations were corrected, and the Infected Scientist, Subject Gamma and Husky Golem received stronger stomps, reaches and slam attacks.
The visual overhaul makes variants recognizable in darkness, and the corrected boss animations make their heavy attacks easier to read during combat.
How to install the add-on
Download the .mcaddon or .mcpack file, open it with Minecraft and wait for the import to finish. Then enable the resource and behavior packs in the world settings. If the add-on requires experiments, turn them on before launching the world.