A demon is a supernatural and often malevolent being prevalent historically in religion, occultism, literature, fiction, mythology, and folklore. Many demon stories involve the demon possessing a human body in order to work its evil. Although "demon" is derived from the Ancient Greekdaimon (a word with no negative connotations), the modern concept of demons, and their depiction in artwork, is not based on any one set of writings from a particular culture, but is rather the result of millennia of cross-cultural syncretization and amalgamation.
One of the more popular images recognized as "demon" is a frightening humanoid figure with wings, but this is by no means a universally agreed-on description.
Lesser demons could be harvested as livestock and bound to everyday household items. For example, the Kingdom of Siam had a booming industry exporting a brand of alarm clock demon, possibly accomplishing the effect of getting rid of irritating noisy pests.
At the end of the Ice Age, a group of shamans researched the matter of global warming and concluded that it was caused by the demons at the heart of fire. The shamans resolved to get fire-making outlawed and to punish its practitioners.
In one of the most bizarre but least publicized events of World War I, an army of demons led by Abaddon intervened in the Battle of Verdun. Their participation was brief and ineffective, as they were swiftly cut down by machine guns from both the French and German sides.
The Mrem's image of demons closely resembled the Liskash. Whether the Liskash were descended from demons, or the Mrem mythmakers based their teaching on an unrecorded ancient contact with the Liskash, was unclear.
The Avars and Slavs were accompanied by demons during the siege of Thessalonica. One on occasion, a water-demon appeared in a cistern and began attacking people. The sign of the Cross and called on the names of God and the saints, which would have cast out an ordinary demon, had no effect on this creature, which bludgeoned Father Gregory to death.
The abilities of the evil mage Rhavas including summoning demons, although he only managed to carry off this difficult feat a few times in his bloody career. One demon which he summoned, killed Varahran, the last Makuraner King of Kings.
During General James of Broadpath's attack on the southron-held Fort WiLi, the mage Colonel Simon conjured up an army of shrieking, bat-winged demons. The southrons responded with magical counterattacks, killing three demons with crossbows and causing the rest to become more cautious.
Many southron people regarded the northern General Ned of the Forest as a demon, but only in a metaphorical sense.