This ancient shrine, dedicated to the serpent gods, becomes the center of vibrant festivities and deeply rooted rituals during this time. The celebrations commence seven days before the Ayilyam asterism in the Malayalam month of Kanni, which typically falls around September or October. Each day leading up to the festival is marked by special rituals, drawing devotees from across the state to participate in and witness these sacred proceedings.

One of the festival's key highlights is the ceremonial procession from the Sree Nagaraja Swami Temple to the Meppallil Illam, an ancient Brahmin home. This procession is a significant event that symbolizes the deep connection between the temple and the traditional Brahmin households. The evenings are particularly notable for the Sarpabali ritual, performed to appease the serpent gods. This ritual involves offerings and prayers, creating a mystical atmosphere that resonates with the devotion of the participants.