Revenant

Revenants are undead humans that have been raised from the dead and controlled by dark magic. While Revenants retain their original memories and personalities, they are little more than undead puppets.

Abilities
Being technically deceased, Revenants no longer feel pain, nor are they affected by exhaustion, aging, or disease, making them dangerous, relentless warriors that can strike with enough force to break through concrete, move fast enough to dodge automatic gunfire, and ignore fatal physical damage and continue fighting indefinitely among other incredible feats.

Appearance
Revenants are magically preserved in the physical state that they were in before being reanimated, protecting from further decay. However, while some revenants resemble freshly dead corpse, while others can be horribly disfigured, with sunken, bloodshot eyes, cracked teeth, and missing or decaying flesh, having been reanimated in an advanced state of decay. In these instances, the Revenant reeks of decay, and can be detected from several yards away just by its smell alone.

Behavior
While Revenants seem to have free will and the ability to voice their own opinions, they cannot disobey direct orders from their master. Once they were given a task, the Revenants would stop at nothing to see it done.

Diet
Being technically deceased, Revenants no longer require nor can they ingest food.

Transformation
After the first Revenant was created, it was discovered that humans can become Revenants by consuming the creature’s tainted blood and subsequently dying with it in their system. The nature of the human's death is irrelevant so long as the body remains mostly intact.

Weaknesses
Incineration: Being technically deceased and immune to pain, Revenants must be fully dismembered and incinerated, since conventional weapons have no lasting effect on them.