The legend of the ghoul is one that fascinates me thoroughly. Many people confuse ghouls with zombies, but they are completely separate creatures. Originating in Arabic folklore, Ghouls are humanoid creatures who feast on the flesh of the dead. It is said that they live in cemeteries, coming out at night to eat their fill from fresh graves. It is even thought that ghouls might be willing to kill for their meal, but only if it is of little risk to them.
Ghouls are undead creatures, but where do they come from, and how does one become a ghoul? There are many theories: Many believe, typically from Arab folklore, that ghouls are demonic creatures. Some believe you are born a ghoul, while others believe you can become one from sickness or corruption of the soul. You can read more about it in [this] article.
To slay a ghoul, Arab myth says one swing of your sword is enough. These creatures are never seen in daylight, so maybe the sun is poison to them.