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.

Stench Of Death. All undead in a 100 ft., aurora are immune to all ranged attacks and gain one hit point every turn. (Stacks)

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

Bite. Melee Weapon Attack: +str bonus to hit, reach 1ft., one target. Hit: 9 (1d20 + 9) ongoing poison damage. I this attack reduces target to 0 hit points it will turn target into A Zombie Werewolf with 10 hit points. 

Howl. Ranged  Weapon Attack:  +3 to hit, reach 100 ft., one target. Hit: Summons 10 zombies around the target.