A Demigod is the offspring of a god and a human and can be found in the literature of many cultures dating back to the beginning of recorded history. Their divine birth is said to give them unnatural physical traits and a link to their divine parentage. Because of this they have been depicted as the hero in many legends.
Much like Angels, Demons are supernatural beings thought to be messengers or representatives of the gods. They are commonly considered to be servants of evil although the origin of the term comes from the Greek, Daimon - a term which never specified the entities as being good or evil. The belief that demons are servants of darkness seemed to appear later in history.
Dragons of one variety or another are part of the lore of nearly every civilization on earth. One theory is that when early man discovered dinosaur bones they recognized them as monstrous reptiles and without the opportunity to see a living one first-hand they attached to them magical powers.
The traits of dragons vary greatly between legends. Sometimes they are depicted as bloodthirsty villains and sometimes are said to be celestial beings that bring good fortune. Physical appearances also differ from one culture to another. Some dragons are wingless, some have no limbs at all and some are feathered.
The name Draugr is synonymous with revenant and in other interpretations translate to "again-walker". The Draugr differ from zombies in several ways - they are risen dead but are just as susceptible to a second death - even more so because often their bodies decay and simply cease to function. Draugr also have the ability to change size at will and have supernatural strength.
In Greek mythology Dryads are Nymphs associated with living in, around and guarding oak trees. Nymphs in general are long-lived nature spirits who watch over a specific aspect of nature. Other Tree Nymphs include: Daphnaie, Epimelides, Hamadryad and Meliai.