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.

Still as Stone: Zombie dwarfs can hide as boulders before adventures enter the room or cave. They can launch 1 surprise attack with advantage. players must make a perception check with DC of 15 to prevent surprize attack.

Light Hammer. Melee Weapon Attack: +3 to hit, reach 5ft. Hit 1d4+2 Bludgeoning damage.

Dagger. Melee Weapon Attack: +3 to hit, reach 5ft. Hit 1d4+2 Piercing damage.

When you take the Attack action on your turn and attack with a Light weapon, you can make one extra attack as a Bonus Action later on the same turn. That extra attack must be made with a different Light weapon, and you don’t add your ability modifier to the extra attack’s damage unless that modifier is negative. For example, you can attack with a Shortsword in one hand and a Dagger in the other using the Attack action and a Bonus Action, but you don’t add your Strength or Dexterity modifier to the damage roll of the Bonus Action unless that modifier is negative.