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.

Infectious Bite. Any living creature bitten by a zombie must make DC 10 Constitution saving throw or contract zombieism. After 24 hours, the bitten creature becomes a zombie if it dies or fails another saving throw. The only way to cure zombieism is through greater restoration spell.

Zombie Resilience. Zombies are immune to poison damage and the poisoned condition. If attack with necrotic damage, they heal for half the necrotic damage taken.

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: 6 (1d6 + 3) piercing damage.