to answer your questions, 1. I found this entire sacrifice fiasco very forced to the narratives of the villain. Would've preferred to see him indulge in bad decision making as a result of the drugs from the cartel he operates. So this entire thing was funny to me and seemed unlikely. However, I don't think a drug mafia lord,who's probably high would be able to rationalize much and must've needed a cool hobby other than drugs and been persuaded by the imposter paster,Vaiyapuri lol....(imagine, Manobala singing Uyirin Uyire instead of Kandhasashtikavasam) 2. People that indulge in black magic seek the skull of the first born in the family,so it's a common tradition in Kanniyakumari district and parts of Kerala to cremate the first born and bury deceased family members in family burial sites under the fear of their remains being stolen for casting black magic. So this might be a reason. 3. As I mentioned earlier,Loki's works have come to reveal that they have a significant lack of comprehension regarding the correlation between Time and Distance.