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.