Your Constitution score increases by 2, and your Wisdom score increases by 1.

Zombies do not age at all, due to already being dead, however if their body is not well-kept they can start to rot.

Zombies can be from any humanoid, ranging from the shortest human to the tallest goliath. Your size is Medium. 

Your base walking speed is 30 feet.

Your sight has been restored by necromancy, giving you unnaturally sharp vision. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray. 

You know Prestidigitation from the wizard spell list. Wisdom is your spellcasting ability for it.

If damage reduces you to 0 hit points, you 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 success, you are reduced to 1 hit point, instead. After you use this trait, you can’t use it again until you finish a long rest.

You are humanoid but register as undead for detection spells. You are immune to disease and the poisoned condition, and you have resistance to poison damage. You do not need to eat or breathe, but you can ingest food or drink if you wish. Instead of sleeping, you enter an inactive state for 4 hours each day. You do not dream in this state, but resting in this way is otherwise identical to sleeping. Magically induced sleep can cause you to enter this inactive state. 

You can speak, read, and write Common, No Tongue, and one language of your choice. No tongue is the language of the undead, which sounds like the creaking and cracking of bones, and is spoken by almost all sentient undead.