Armor Class 15 (natural armor)
Hit Points 97 (13d8 + 39)
Speed 30 ft.
Saving Throws WIS +1
Damage Resistances cold, necrotic
Damage Immunities poison
Condition Immunities charmed, exhaustion, frightened, paralyzed, poisoned
Senses darkvision 60 ft., passive Perception 8
Languages understands the languages it knew in life but can't speak
Challenge 5
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.
TftYP, p. 237