Those curious enough to get close in the Gbagi market quickly dispersed when they heard his message. "Anyone that can provide any evidence for the existence of the supernatural, be it juju or voodoo magic, will be offered 2.5m naira ($6,000, £4,650)," he announced repeatedly in Yoruba and English.
The 24-year-old atheist has recently emerged as a rebel publicly contesting the powers of the supernatural in this deeply religious country.
Belief in African traditional religions and its juju components are widespread in Nigeria, with many combining them with either Christianity or Islam,
according to a 2010 report by the Pew Research Centre.
Many Nigerians believe that magic charms can allow humans to morph into cats, protect bare skins from sharp blades and make money appear in a clay pot.