Hanuman assumed Panchamukhi or 5-confronted form to destroy Ahiravana, a strong rakshasa black-magician and practitioner in the dim arts in the Ramayana war. Ahiravana, brother of Ravana, had taken Lord Rama and Lakshmana to netherworld as captive, and the only real technique to destroy him was to extinguish 5 lamps https://aristotlej420hnv6.blogsvirals.com/35771991/beej-mantra-no-further-a-mystery