The Caribbean has been the locus of diaspora, migration, even transmigration since Western colonizers plundered the native societies in Africa and took Africans to many islands and lands located in and around the Caribbean Sea so as to exploit them as slaves for the purpose of cultivating plantations. As a result, Caribbean ethnicity and cultures are complex and include descendants of African slaves, European colonizers, and native Caribs. Jamaica Kincaid shows creolized Caribbean realities representing an African diasporic religion like Obeah, which is practiced in anglophone Caribbean countries by descendants of South African slaves in her works. In this paper, I explore Obeah and Jablesse as supplementation and alternative discourse in Jamaica Kincaid's At the Bottom of the River. According to Alan Richardson, Obeah played a role at once inspirational and practical in facilitating resistance and revolt among the African slaves in the Caribbean. As a cultural marker within British colonial disbelief underscoring the cultural superiority of the British, Obeah must be outlawed and obliterated by the imperialists considering it savage custom and African barbarity. In Obeah, the jablesse is a creolized spirit that takes a lot of forms and incarnations. Also, the jablesse includes the marks of both African diasporic religions and its oppression under British Colonialism. In Kincaid's literary texts, the powerful evocation of the jablesse based on Obeah shows the sparks of imagination and the creation of alternative world subverting colonial power.