Undead Fortitude. If damage reduces the zombie to 0 Hit Points, it must make a Constitution saving throw with a DC of 5 plus the damage taken unless the damage is Radiant or from a Critical Hit. On a successful save, the zombie drops to 1 Hit Point instead.

Slam. Melee Attack Roll: +3, reach 5 ft. Hit: 4 (1d6 + 1) Bludgeoning damage.

Insensitivity. Due to its phyisical constitution, this Undead Minion is insensitive to Damage. Nonmagic physical damage lesser than 5HP will not cause a reduction of the Hitpoints nor it will cause any condition.