In ancient Greek literature, an eidolon (plural: eidola or eidolons) (Greek εἴδωλον: "image, idol, double, apparition, phantom, ghost") is a spirit-image of a living or dead person; a shade or phantom look-alike of the human form. The concept of Helen of Troy's eidolon was explored both by Homer and Euripides. However, where Homer uses the concept as a free-standing idea which gives Helen life after death, Euripides entangles it with the idea of kleos, one being the product of the other. Both Euripides and Stesichorus, in their respective works concerning the Trojan War, claim that Helen was never physically present in the city at all.
In popular culture
- In The Mark of Athena by Rick Riordan, three eidola appear as antagonists.
- In the short story "The White Ship" by H. P. Lovecraft the city of Thalarion in the Dreamlands is ruled by an eidolon named Lathi.
- In Clockwork Angel by Cassandra Clare, Tessa, the main protagonist is a 16-year-old girl whose father was an Eidolon, a shapeshifting demon. Tessa is a shapeshifter as well, though not a demon, and is told by a Silent Brother that she is Eidolon.
- The third part of "Helen in Egypt," the long poem by H.D. (Hilda Doolittle) is titled "Eidolon."
- In Ian Tregillis' Milkwood Triptich, the other-worldly entities responsible for magic are known as Eidolons.
- The Eidolon, a 1985 game by Lucasfilm Games.
- In the Warhammer 40k Universe, Lord Commander Eidolon is the First Captain of the Emperor's Children Astartes Legion.
- In the Magic: the Gathering plane of Theros, an eidolon is a spirit created when the soul of a dead person separates from its body.
- In the multiplayer online battle arena video game Dota 2, the hero Enigma conjures minions called Eidolons with his spell Demonic Conversion.
- In the 1996 video game Death Rally, one of the tracks is named Eidolon.
- A demon named Eidolon is the main antagonist and final boss in the 1997 game Hexen II, the third game in the Hexen/Heretic series.
- In the 2000 video game Final Fantasy IX and the 2010 video game Final Fantasy XIII, players are able to summon entities called "Eidolons" to assist in battles.
- In the popular dice-based rpg Pathfinder Roleplaying Game, an eidolon is a supernatural creature bonded to a character of the Summoner class. In Dungeons & Dragons, 4th Edition, an eidolon is a golem-like animated statue brought to life by a shard of divine energy. In Eclipse Phase, an eidolon is a specialized computer program that acts as digital body for digitalized minds, allowing infomorph characters to specialize.
- Eidolon, a 2014 first-person narrative introducing the protagonist or player-vehicle to a far-flung post-apocalyptic western Washington.
- Aura Kingdom, an MMORPG produced by Aeria Games, has a plotline that revolves around creatures called Eidolons.
- In 2014 series The Bridge, S2, Ep.10, "Eidolon."
- Holmberg, Ingrid E. (Spring 1995). "Euripides' Helen: Most Noble and Most Chaste". The American Journal of Philology (The Johns Hopkins University Press) 116 (1): 19–42. JSTOR 295501.
- Meltzer, Gary S. (Oct 1994). ""Where Is the Glory of Troy?" "Kleos" in Euripides' "Helen"" 13 (2). University of California Press. pp. 234–255. JSTOR 25011015.
- Papi, Donatella Galeotti (1987). "Victors and Sufferers in Euripides' Helen". The American Journal of Philology (The Johns Hopkins University Press) 108 (1): 27–40. JSTOR 294912.
- Barasch, Moshe (2005). "The Departing Soul. The Long Life of a Medieval Creation". Artibus et Historiae (IRSA s.c.) 26 (52): 13–28. JSTOR 20067095.
- Carpenter, Frederic I. (Mar 1942). "Walt Whitman's "Eidolon"". College English (National Council of Teachers of English) 3 (6): 534–545. JSTOR 370944.
- http://www.theosociety.org/pasadena/etgloss/etg-hp.htm Encyclopedic Theosophical Glossary: A Resource on Theosophy, G. de Purucker
- Morph Recognition Guide
http://paizo.com/pathfinderRPG/prd/advanced/baseClasses/summoner.html Pathfinder Reference Document