Zombies...
Humanoid creatures created by the Devilish corruption of a man's body and soul. They sought human flesh and could smell human blood from a mile away.
'Can {Zombie} blood be a good mana catalyst?'
While Devil Essence was the main determinant of Devilish corruption, the different strains of mana also played a heavy part in the mutation.
Not only that, but different {Zombies} possessed different abilities. Some were fast, some possessed brute strength, and others could even use magic.
Right now, Cain stood inside the upper floor of one of the only taller buildings still standing. In there, he was able to see the overwhelming sea of zombies treading down below.
As long as they couldn't see, hear, or smell humans, the Zombies were pretty docile abominations. Peaceful, but abominations nonetheless...