Here is the background. So, I am playing in a campaign where I have a homebrew spell with allows me a Zombie-like companion (basically a Zombie with additional HPs).
If I cast the spell every 8 hours for 8 days, I get to keep it as a permanent companion. However, I'm trying to work out how I can restore or increase its HPs, so that it doesn't die (lol) on me.
Would a Zombie companion (un)naturally recover HPs each day?
This is not a question about "healing" an undead creature such as a zombie.