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.

Boils. If the boil on the zombie's neck is pierced or otherwise opened, all creatures within 5 ft in front and to the side in which the boil was facing must make a Dexterity saving throw with a DC of 10. On a fail, the creature is covered in the purple pus. if the creature has any open wounds, the creature contracts the Purple Boil disease and will be zombified within 1d4 days unless counteracted by the antidote.

Slam. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage.

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) piercing damage.

Nail Attack. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) slashing damage.