Undead enemies will have a skeleton-like design, the main feature visible to the player from this will be the skull. The other features could be a rib cage or other parts of the skeleton only visible in certain areas of the character.
My designs above show various types of enemy from the same family - undead skeletons. From the left: (respectively)
The warrior type,
Assassin/ninja type,
Summoner type
As you can see, each enemy from this family includes similar features to ensure that there is no confusing them from being from the same place.
This would be the design for the boss of the undead family. The design is a mix between a human skull and a disco ball. This enemy would float above the floor and deal a great amount of damage to the players' party through magical attacks / since he doesn't have any body parts to deal physical damage with/
I made 2 different versions of the boss enemy.
One is more deformed - being 2 skulls conjoined into one.
The other is a more normal looking skull.
