Local religious beliefs termed as animism and dynamism by Giddens are still found in the religious practices of Indonesian communities. One of such practices occured in Bugis Ujung-Bone society, South Sulawesi. People’s faith in supernatural beings which are mythically believed as giving something meaningful for them is reflected by performing certain rituals in their daily lives. This ritual is performed at home and in a special place called Addewatang. This local belief system was firstly conceived and conceptualized by Sanro Maggangka. It grew into a local ritual tradition in Ujung-Bone society. This local ritual tradition were then acculturated with some formal religion’s activities. In the meantime, the figure of sanro becomes very important as a mediator in every religious ritual practiced by the society. Finally, hegemonic domination by the sanro can be observed in every thoughts and actions of the society, especially in their religious practices. In this research, the phenomenon were analyzed with the phenomenological-constructionist analysis. There are two findings of this research. First, there is a public perception that the practice of religious ritual done so far is believed as a part of their formal religion’s belief system. Second, there is a strong hegemony and dominance of the sanro’s role in conceptualizing this local ritual practice into their formal religion’s activities. The impact of this mythical belief of the role of sanro and “Putta Sereng” can be seen in the faithfulness of the people to act based on sanro’s instructions, the decrease of the people’s faith in their own formal religion, and the occurrence of theological confusions in the younger generations of Ujung-Bone society.