To create such creatures, you need to be familiar with the models from the sixth installment, but I'm not good with them. However, some creatures were present in NCF, at least ghouls were definitely there.
Added 9 minutes later
By the way, I have an idea for an NCF creature, the Kutrub.
Ghoul (Kutrub variety)
Description: Terrifying creatures that inhabit wastelands. While roaming deserted places, Kutrubs prefer not to hide their muscular bodies, as they love heat. Woe to travelers who stray into the favorite haunts of these monsters, for Kutrubs are flesh-eaters. Ghouls are a subspecies of Kutrubs. Unlike their desert relatives, ghouls have white skin because they live in caves.
Abilities: Living creature, Frenzy, No Retaliation, Cleaving Sword, Strike and Return, Swift Attack, Cleaver, Double Strike, and Savage Retribution.
Appearance: Similar to a Kutrub, but with slightly altered colors. The skin is gray, and the fur on the legs is black.
Overall, it's not very interesting, just a monster.
Added 41 minutes later
For me, the most important thing about a unit is its backstory.
Usually, it contains many details, so not everything fits into the description.
A ghoul is just a monster, a relative of another monster that lives in a Dungeon; it's boring.
Here's an example of a backstory I worked on.
These were goblins with rat skulls. I decided that they were evil spirits that take over corpses and change their shape. The resurrection occurs without the help of mages, purely due to the evil aura of these spirits – this applies to both rats and harpies with skulls.
These are general details, then there are individual ones, for example, that they hunt in packs, that they are cowardly not just for the sake of it, but for the survival of the species, because only the aura is needed for reproduction.
