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.

Original Creator. Will Sometimes listen to Dr. Doofenshmirtz.  DC of 15 to see if they do or not.

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

Pharmacist Static. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage.  If the attack hits and the user is not wearing anti-conductive materials, then they turn into a Zombie Pharmacist and say "Lots of me" as soon as they do so.  On an Arcana check with a DC of 20, the effect can be ignored.