Ronald McDonald, the icon of the American fast food chain, will be the target for a spear-throwing contest at the revived Lammas Games at Braziers Park, near Wallingford.
A giant effigy will be set up for the spear throwers, which will then be ceremonially burned at the end, as Druids in full robes deal with him in a Lammas Ritual.
Other games at the event, organised by the Druid Network and which takes place between noon and midnight on Saturday, August 5, will include wife-carrying, giant cheese rolling, throwing Thor's hammer, hobby horse racing and three-legged racing, the traditional Oxfordshire game Aunt Sally, archery and fighting with staves, all fuelled with a new real ale, Druids Fluid.
There will be a healing tent along with rune and tarot card readings. And, bizarrely, there will also be a five-a-side football contest.
The Lammas Games were a part of English country life at harvest time and were revived at Braziers Park two years ago.
Lammas or loaf mass celebrated the first harvesting of wheat and is traditionally held on August 1 or 6.
As well as the more energetic celebrations, there will be a competitive Eisteddfod to win the Spear of Lugh. Anyone can enter with a poem or song or a story on payment of a 21st century fee of £5.
And there will be a 12ft-high artwork Homage to the Goddess by artist Susan Goundrey-Kruse (ok ok), exploring links between the pagan goddess of the harvest and the Christian St Bridget who supplanted her.
There will also be a vegetarian cafe and various craft stalls.
Organiser Cathi Davies said Ronald McDonald was picked as target because McDonald's represented the opposite of what the Lammas celebration was all about.
She said: "It is to make a spiritual and environmental point that Lammas is about working in harmony with nature and other people.
"I'm doing a talk on Trade Not Aid about how harvest celebrations offer our communities a chance to consider how we honour our relationship with those who provide us with what we need.
"True and fair exchange enriches our lives and allows us to celebrate the abundance we enjoy."
Money raised at the games goes to three charities: Oxfordshire's Flexicare which provides help for families with special needs children, the Dr Hadwen Trust which tries to find alternatives to experiments on animals and Tree Aid which provides aid to communities in Africa.
Entrance to the Games is £10 a head and £5 for children between six and 12.
Visit the website www.lammasgames.org.uk for more details.