Sovereign Race?

I'm not sure you can do this just with the editors included in game, I think you'd have to look into modding the game. But the modding community for this game is very good. Take a look at the Children of Storm mod by Heavenfall, he has some non-humanoid races such as Centaur, Angels etc.

https://forums.elementalgame.com/443960/page/1/#3357353

You could also try using the faction creator to create a race with very pale skin or skin of the sort of colour you think a Zomibie would have. The Wraiths (Oracle Ceresa/Resoln) already look kind of Undead. Maybe not what you are looking for, but it might be a place to start. Butchermen (who are the closest Elemental comes to Zombies I think) do kind of go down this route.

Hope that helps. All the Best.

Thanks for the help, it's a shame you can't do it in the workshop but i might see if there are any modding tutorials and do it myself Thanks!

Happy to help. If you find any modding tutorials please let me know.

havent found much as far as modding tuturials for creating custon races. just have to go throught the code and try and figure it out. ill try that over the next few days and possibly write something up.

also forgot there is a mod called necromancy extended or something similar to that. its not a race but it gives you the option to make a more or less undead faction. you could try looking into that if you want to play a faction that can produce undead from the cities.