A gambling element with a pictographic illustration on the obverse side. Eidolons generally appear in decks containing suits, each suit containing a series of eidolons of different values which indicate their importance.
Common sets of eidolons contain four suits, typically "Swords", "Cups", "Orbs" and "Dzurs", although decks of eidolons with different suits than these are not unheard of.
Eidolons are used for some of the more popular games in Jhereg gambling houses, including Orbs, Bones, Shereba, and Seven-Clawed-Jhereg.