Ghouls: Undead creatures that feed on human flesh. As the ghouls gain more power, they grow stronger and can make special features to their bodies eg. wings.
Werewolves: A demon who can transform into a wolf-like creature, typically during a full moon. In many case it is driven by the lunar cycle or a curse. They travel in a pack. The only way a human can become a werewolf is by receiving a bite from the Alpha.
Witches: Witches are have the ability to cast spells, create potions, and summon or control various forces of nature or the supernatural.
Phantoms: Phantoms can be born in two ways.
One: Death, when a human dies they can be reborn as a phantom. This occurs when they have some unfinished business and their overwhelming fear of death.
Two: Negative energy often results in the birth of a phantom. Strong negative emotions. A very rare case.
The negative energy can fuel a phantoms power.
Phantoms are classified in three categories
First: Green Phantoms.
These phantoms are either born from extremely positive feelings which is rare but the most common are the ones born from weak negative feelings. They are basically harmless.
Second : Red Phantoms. These are the ones born from strong negative emotions. They are dangerous. They are not capable of speech or understanding.
Third: Grey Phantoms.
Unlike the others these are souls trapped by lingering feelings and no not their feelings, the alive people's feelings. These evolve and are capable of speech, understands.
Even after they forget about the deceased, the soul will live on forever without anyother choice to feed on souls.