Hanuman assumed Panchamukhi or 5-faced type to eliminate Ahiravana, a robust rakshasa black-magician and practitioner from the darkish arts in the Ramayana war. Ahiravana, brother of Ravana, had taken Lord Rama and Lakshmana to netherworld as captive, and the only real approach to destroy him was to extinguish 5 lamps https://www.instagram.com/tantramantraaurvigyaan/