Geared mobs

Some mobs can spawn wearing armor or holding weapons, both of which may be enchanted. In addition, some of them may also spawn with the ability to pick up armor and items that are on the ground.

Adult zombies, husks, and zombie villagers can sometimes spawn wearing armor of any tier up to diamond and/or holding an iron sword, iron shovel, or iron spear.

Drowned can sometimes spawn holding a trident.