When 'Melsanthi' (chief priest) N Parameshwaran Namboothiri opened the portals of the sanctum sanctorum and lit the lamp under the guidance of 'Thantri' (head priest) Kandari Rajeevaru, the 'Sannidhanam' reverberated with the holy Ayyappa chants. On Wednesday, "Laksharchana", a special ritual, was held at the shrine besides the customary pujas.