An epic is a long narrative poem that recounts the deeds of a larger-than-life hero who embodies the values of their society. Epics often concern conflicts between good and evil and are written on a grand scale. There are two types of epics: folk epics which are oral traditions that change over time, and literary epics which are fixed written works. Epics feature heroes who are great leaders identified with a people and undertake extraordinary journeys. Gods or supernatural beings may participate while the story is told in heightened language using conventions like invocations, flashbacks, and similes. The epic hero embodies the highest cultural ideals through their quests and abilities to overcome obstacles while maintaining their humanity.