[3] Consequently, its population has a complex mixed ethnic origin which has given rise to some unique traditions not previously found elsewhere in Yorubaland but which have since spread to the Iyagba, Igbomina, Oshun, Owo and Ijesha regions.
It is also not surprising to find that the warrior figures often surmounting Epa masks represent heroes who proved their mettle during this long period of instability.
Perhaps, then, the iconographic clue to the meaning of Epa masks is not to be found in their elaborate superstructures, but in the crude pot helmet itself as a manifestation of the efficacy of ase for communal and personal well-being.
According to Robert Thompson, 'the Epa cult stresses the transformation of young men into stalwart specimens able to bear pain and shoulder heavy weight'.
[5] In north-eastern Yorubaland, Epa and other masks are used in annual ceremonies, held in February or March in some places or as late as September in others to promote the fertility and well-being of the community.
[5] They also appear in Elefon festivals performed to celebrate the return of the warriors, to honor Ogun, the god of war and iron and to mark the growth of new crops.
In one fairly consistent episode in the festival the masquerader, supporting a mask which can often weigh 50 lbs or more, attempts to jump off a mound to augur the quality of the new year.