Help with corpse problem please!

I have a skill that's based off of raise dead, and it summons zombies. My problem is that when the zombies die, they leave a corpse and I can just summon them again. I know there is a fairly simple solution, my mind is just blank today. Will anyone tell me how?

Isnt there a field in the unit editor that has like - Does decay, Doesn't decay. I think if you choose Doesn't decay that might help you. And your basing your unit off the wrong unit, base it off a skeleton.

It seems that I tried to be lazy and just edit the zombie, but the only way you can not make a corpse is basing it off of a skellie. Thanks Pesmerga. :D

Or base it off a hero :)