Turn Resistance. The zombie has advantage on saving throws against any effect that turns undead.
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.
Multiattack. The zombie makes two melee attacks.
Empowered Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit:7 (1d6 + 4) bludgeoning damage and 7 (2d6) necrotic damage.
Many of those who brave the Tomb of Horrors believe they have reached their ultimate destination when they disturb a skeletal figure inside a secluded crypt. It is, in fact, a greater zombie, a creature magically created from a humanoid corpse to be far more resilient than a typical zombie.