Hanuman assumed Panchamukhi or 5-faced kind to destroy Ahiravana, a strong rakshasa black-magician and practitioner on the dim arts during the Ramayana war. Ahiravana, brother of Ravana, had taken Lord Rama and Lakshmana to netherworld as captive, and the only real strategy to kill him was to extinguish 5 lamps https://www.instagram.com/tantramantraaurvigyaan/