https://minecraft.fandom.com/wiki/Minecraft_Dungeons:Armored_Frozen_Zombie

Armored Frozen Zombies are armored variants of the Frozen Zombie found in the Creeping Winter DLC. Other than having a larger size, they also possess two variants: The weaker variant wears a Scale Mail chestplate and wields a Dagger in a reverse grip, while the stronger variant wears a Reinforced Mail chestplate and wields a Sword.

Like their unarmored counterparts, they attack the player via melee using their spawned weapons as well as having increased defence. Also like their unarmored counterparts, they throw snowballs at players at a far distance to freeze them and sprint towards the player they froze.