Possessed Zombie (5e Creature)
From D&D Wiki
Medium undead, chaotic evil
Damage Vulnerabilities radiant
Psychic Susceptibility. If the zombie takes psychic damage, it must make a Charisma saving throw with a DC of 5 + the damage taken. On a failure, the spirit animating the zombie is expelled from the corpse.
Spider Climb. The zombie can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Undead Fortitude. If damage reduces the zombie to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the zombie drops to 1 hit point instead.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) piercing damage.
Slam. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) bludgeoning damage.
The common zombie is a corpse raised into undeath by evil magic. A possessed zombie is a corpse risen by becoming possessed by the spirit of a demon or other fiend, wanting to sneak into the Material Plane via the Ethereal Plane. Although the spirit would prefer a more powerful living host, a corpse will do if available. Unlike ordinary zombies, possessed zombies avoid hazards and wield weapons if available.